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Python script not running correctly when launched with crontab


Error when attempting to create Python GUI using Tkinter: “no display name and no $DISPLAY environment variable”raspberry pi2 photogateCrontab on Rpi not running Python scriptPython3 flagging 'async def' as invalid syntaxCrontab task not running script - Permissions?Lighttpd running FastCGI script hangs and give 500 internal errorRun python script from phpPython script not running when added to crontabPython script not running on start upUnable to run python script on boot













3















I'm running a telegram bot on my Raspberry Pi 3. When I run it in my console or using Thonny, everything runs smoothly.



python3 /home/pi/Documents/telegrambot.py


The problem occurs when I set the program to start on boot.



sudo crontab -e
[last line] @reboot sudo python3 /home/pi/Documents/telegrambot.py &


I know that the code is running because I set the bot to send me "I'm online" and it answer me if the reply isn't related to sending images... but when I send to it /tempgraph, it should answer with the the picture of its readings.
But I only get the sensor's name and no image at all.



...
chatHist = readCommandHistory(db,chat_id,1)
lastCommand = chatHist[0]['msg']
choice = command.split(".")
if command in lastCommand and len(choice) <= 2:
Fonte = re.search('(s|n)'+str(command.split('.')[0])+')s(.*)', lastCommand).group(2)
bot.sendMessage(chat_id, Fonte) #this works
if len(choice) == 1:
table = sdc.readTableServer(db, senstable, 'Fonte', Fonte)
for sensor in table.Sensor.unique():
bot.sendMessage(chat_id, sensor)
tbl = table[table.Sensor == sensor]
#until here everything is ok
for ts in tiposensores:
try:
gop.plotSetup(tbl[['Data',ts]])
#save the image in the folter ... Images/Imagem.png,
#but only works when not on stratup...
bot.sendPhoto(chat_id,open('/home/pi/Documents/Images/Imagem.png','rb'))
pif.cleanImages()
except OSError:
pass


...



@edit:



I found out that the problem happens after i call



gop.plotSetup(tbl[['Data',ts]]) 


inside the plotSetup function, in this step:



f= plt.figure(figsize=(12, 9))


This is the first time that i use the variable f inside the function.



@edit2



As I said before, the error happens in the plt.figure.



THis is the gpo.plotSetup(), with some changes to catch the error as instructed:



def plotSetup(Data):
...[some code here]...
with open("/home/pi/Desktop/log.csv","a+") as o:
fop.writeCSVFile(o, ['before first plt.figure'])

try:
f= plt.figure(figsize=(12, 9))
except IOError as e:
fop.writeCSVFile(o, e)
except:
for e in sys.exc_info():
fop.writeCSVFile(o, e)

...[some code here]...
f.savefig("/home/pi/Documents/Images/Imagem.png", bbox_inches="tight")


and i got this errors:



<class '_tkinter.TclError'>
no display name and no $DISPLAY environment variable
<traceback object at 0x6e3c8d50>


@edit3



That error led me to this post:



_tkinter.TclError: no display name and no $DISPLAY environment variable



this post suggested use this in the very beginning of the code:



import matplotlib
matplotlib.use('Agg')


and then VOILA!! It's alive.



Really appreciate all the help that you guys gave me, thanks! ;p









share









New contributor




SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.




















  • Does this gop.PlotSetup generate a picture and store it on disk?

    – Mark Smith
    yesterday











  • Edit the crontab without "sudo": $ crontab -e

    – Benyamin Jafari
    yesterday












  • @MarkSmith, yeah it does! I'll add the last line of this function in the post.

    – SWoto
    yesterday











  • @BenyaminJafari, tried this too, everything runs in the same way as before (sending pictures still not working) =(

    – SWoto
    yesterday











  • Debug the python script to a log file and check the errors after booting. Make sure you use chmod -R, recursive.

    – Pedro Lobito
    yesterday
















3















I'm running a telegram bot on my Raspberry Pi 3. When I run it in my console or using Thonny, everything runs smoothly.



python3 /home/pi/Documents/telegrambot.py


The problem occurs when I set the program to start on boot.



sudo crontab -e
[last line] @reboot sudo python3 /home/pi/Documents/telegrambot.py &


I know that the code is running because I set the bot to send me "I'm online" and it answer me if the reply isn't related to sending images... but when I send to it /tempgraph, it should answer with the the picture of its readings.
But I only get the sensor's name and no image at all.



...
chatHist = readCommandHistory(db,chat_id,1)
lastCommand = chatHist[0]['msg']
choice = command.split(".")
if command in lastCommand and len(choice) <= 2:
Fonte = re.search('(s|n)'+str(command.split('.')[0])+')s(.*)', lastCommand).group(2)
bot.sendMessage(chat_id, Fonte) #this works
if len(choice) == 1:
table = sdc.readTableServer(db, senstable, 'Fonte', Fonte)
for sensor in table.Sensor.unique():
bot.sendMessage(chat_id, sensor)
tbl = table[table.Sensor == sensor]
#until here everything is ok
for ts in tiposensores:
try:
gop.plotSetup(tbl[['Data',ts]])
#save the image in the folter ... Images/Imagem.png,
#but only works when not on stratup...
bot.sendPhoto(chat_id,open('/home/pi/Documents/Images/Imagem.png','rb'))
pif.cleanImages()
except OSError:
pass


...



@edit:



I found out that the problem happens after i call



gop.plotSetup(tbl[['Data',ts]]) 


inside the plotSetup function, in this step:



f= plt.figure(figsize=(12, 9))


This is the first time that i use the variable f inside the function.



@edit2



As I said before, the error happens in the plt.figure.



THis is the gpo.plotSetup(), with some changes to catch the error as instructed:



def plotSetup(Data):
...[some code here]...
with open("/home/pi/Desktop/log.csv","a+") as o:
fop.writeCSVFile(o, ['before first plt.figure'])

try:
f= plt.figure(figsize=(12, 9))
except IOError as e:
fop.writeCSVFile(o, e)
except:
for e in sys.exc_info():
fop.writeCSVFile(o, e)

...[some code here]...
f.savefig("/home/pi/Documents/Images/Imagem.png", bbox_inches="tight")


and i got this errors:



<class '_tkinter.TclError'>
no display name and no $DISPLAY environment variable
<traceback object at 0x6e3c8d50>


@edit3



That error led me to this post:



_tkinter.TclError: no display name and no $DISPLAY environment variable



this post suggested use this in the very beginning of the code:



import matplotlib
matplotlib.use('Agg')


and then VOILA!! It's alive.



Really appreciate all the help that you guys gave me, thanks! ;p









share









New contributor




SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.




















  • Does this gop.PlotSetup generate a picture and store it on disk?

    – Mark Smith
    yesterday











  • Edit the crontab without "sudo": $ crontab -e

    – Benyamin Jafari
    yesterday












  • @MarkSmith, yeah it does! I'll add the last line of this function in the post.

    – SWoto
    yesterday











  • @BenyaminJafari, tried this too, everything runs in the same way as before (sending pictures still not working) =(

    – SWoto
    yesterday











  • Debug the python script to a log file and check the errors after booting. Make sure you use chmod -R, recursive.

    – Pedro Lobito
    yesterday














3












3








3


1






I'm running a telegram bot on my Raspberry Pi 3. When I run it in my console or using Thonny, everything runs smoothly.



python3 /home/pi/Documents/telegrambot.py


The problem occurs when I set the program to start on boot.



sudo crontab -e
[last line] @reboot sudo python3 /home/pi/Documents/telegrambot.py &


I know that the code is running because I set the bot to send me "I'm online" and it answer me if the reply isn't related to sending images... but when I send to it /tempgraph, it should answer with the the picture of its readings.
But I only get the sensor's name and no image at all.



...
chatHist = readCommandHistory(db,chat_id,1)
lastCommand = chatHist[0]['msg']
choice = command.split(".")
if command in lastCommand and len(choice) <= 2:
Fonte = re.search('(s|n)'+str(command.split('.')[0])+')s(.*)', lastCommand).group(2)
bot.sendMessage(chat_id, Fonte) #this works
if len(choice) == 1:
table = sdc.readTableServer(db, senstable, 'Fonte', Fonte)
for sensor in table.Sensor.unique():
bot.sendMessage(chat_id, sensor)
tbl = table[table.Sensor == sensor]
#until here everything is ok
for ts in tiposensores:
try:
gop.plotSetup(tbl[['Data',ts]])
#save the image in the folter ... Images/Imagem.png,
#but only works when not on stratup...
bot.sendPhoto(chat_id,open('/home/pi/Documents/Images/Imagem.png','rb'))
pif.cleanImages()
except OSError:
pass


...



@edit:



I found out that the problem happens after i call



gop.plotSetup(tbl[['Data',ts]]) 


inside the plotSetup function, in this step:



f= plt.figure(figsize=(12, 9))


This is the first time that i use the variable f inside the function.



@edit2



As I said before, the error happens in the plt.figure.



THis is the gpo.plotSetup(), with some changes to catch the error as instructed:



def plotSetup(Data):
...[some code here]...
with open("/home/pi/Desktop/log.csv","a+") as o:
fop.writeCSVFile(o, ['before first plt.figure'])

try:
f= plt.figure(figsize=(12, 9))
except IOError as e:
fop.writeCSVFile(o, e)
except:
for e in sys.exc_info():
fop.writeCSVFile(o, e)

...[some code here]...
f.savefig("/home/pi/Documents/Images/Imagem.png", bbox_inches="tight")


and i got this errors:



<class '_tkinter.TclError'>
no display name and no $DISPLAY environment variable
<traceback object at 0x6e3c8d50>


@edit3



That error led me to this post:



_tkinter.TclError: no display name and no $DISPLAY environment variable



this post suggested use this in the very beginning of the code:



import matplotlib
matplotlib.use('Agg')


and then VOILA!! It's alive.



Really appreciate all the help that you guys gave me, thanks! ;p









share









New contributor




SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












I'm running a telegram bot on my Raspberry Pi 3. When I run it in my console or using Thonny, everything runs smoothly.



python3 /home/pi/Documents/telegrambot.py


The problem occurs when I set the program to start on boot.



sudo crontab -e
[last line] @reboot sudo python3 /home/pi/Documents/telegrambot.py &


I know that the code is running because I set the bot to send me "I'm online" and it answer me if the reply isn't related to sending images... but when I send to it /tempgraph, it should answer with the the picture of its readings.
But I only get the sensor's name and no image at all.



...
chatHist = readCommandHistory(db,chat_id,1)
lastCommand = chatHist[0]['msg']
choice = command.split(".")
if command in lastCommand and len(choice) <= 2:
Fonte = re.search('(s|n)'+str(command.split('.')[0])+')s(.*)', lastCommand).group(2)
bot.sendMessage(chat_id, Fonte) #this works
if len(choice) == 1:
table = sdc.readTableServer(db, senstable, 'Fonte', Fonte)
for sensor in table.Sensor.unique():
bot.sendMessage(chat_id, sensor)
tbl = table[table.Sensor == sensor]
#until here everything is ok
for ts in tiposensores:
try:
gop.plotSetup(tbl[['Data',ts]])
#save the image in the folter ... Images/Imagem.png,
#but only works when not on stratup...
bot.sendPhoto(chat_id,open('/home/pi/Documents/Images/Imagem.png','rb'))
pif.cleanImages()
except OSError:
pass


...



@edit:



I found out that the problem happens after i call



gop.plotSetup(tbl[['Data',ts]]) 


inside the plotSetup function, in this step:



f= plt.figure(figsize=(12, 9))


This is the first time that i use the variable f inside the function.



@edit2



As I said before, the error happens in the plt.figure.



THis is the gpo.plotSetup(), with some changes to catch the error as instructed:



def plotSetup(Data):
...[some code here]...
with open("/home/pi/Desktop/log.csv","a+") as o:
fop.writeCSVFile(o, ['before first plt.figure'])

try:
f= plt.figure(figsize=(12, 9))
except IOError as e:
fop.writeCSVFile(o, e)
except:
for e in sys.exc_info():
fop.writeCSVFile(o, e)

...[some code here]...
f.savefig("/home/pi/Documents/Images/Imagem.png", bbox_inches="tight")


and i got this errors:



<class '_tkinter.TclError'>
no display name and no $DISPLAY environment variable
<traceback object at 0x6e3c8d50>


@edit3



That error led me to this post:



_tkinter.TclError: no display name and no $DISPLAY environment variable



this post suggested use this in the very beginning of the code:



import matplotlib
matplotlib.use('Agg')


and then VOILA!! It's alive.



Really appreciate all the help that you guys gave me, thanks! ;p







raspbian pi-3 python boot





share









New contributor




SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.










share









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SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.








share



share








edited 4 hours ago







SWoto













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asked yesterday









SWotoSWoto

192




192




New contributor




SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












  • Does this gop.PlotSetup generate a picture and store it on disk?

    – Mark Smith
    yesterday











  • Edit the crontab without "sudo": $ crontab -e

    – Benyamin Jafari
    yesterday












  • @MarkSmith, yeah it does! I'll add the last line of this function in the post.

    – SWoto
    yesterday











  • @BenyaminJafari, tried this too, everything runs in the same way as before (sending pictures still not working) =(

    – SWoto
    yesterday











  • Debug the python script to a log file and check the errors after booting. Make sure you use chmod -R, recursive.

    – Pedro Lobito
    yesterday


















  • Does this gop.PlotSetup generate a picture and store it on disk?

    – Mark Smith
    yesterday











  • Edit the crontab without "sudo": $ crontab -e

    – Benyamin Jafari
    yesterday












  • @MarkSmith, yeah it does! I'll add the last line of this function in the post.

    – SWoto
    yesterday











  • @BenyaminJafari, tried this too, everything runs in the same way as before (sending pictures still not working) =(

    – SWoto
    yesterday











  • Debug the python script to a log file and check the errors after booting. Make sure you use chmod -R, recursive.

    – Pedro Lobito
    yesterday

















Does this gop.PlotSetup generate a picture and store it on disk?

– Mark Smith
yesterday





Does this gop.PlotSetup generate a picture and store it on disk?

– Mark Smith
yesterday













Edit the crontab without "sudo": $ crontab -e

– Benyamin Jafari
yesterday






Edit the crontab without "sudo": $ crontab -e

– Benyamin Jafari
yesterday














@MarkSmith, yeah it does! I'll add the last line of this function in the post.

– SWoto
yesterday





@MarkSmith, yeah it does! I'll add the last line of this function in the post.

– SWoto
yesterday













@BenyaminJafari, tried this too, everything runs in the same way as before (sending pictures still not working) =(

– SWoto
yesterday





@BenyaminJafari, tried this too, everything runs in the same way as before (sending pictures still not working) =(

– SWoto
yesterday













Debug the python script to a log file and check the errors after booting. Make sure you use chmod -R, recursive.

– Pedro Lobito
yesterday






Debug the python script to a log file and check the errors after booting. Make sure you use chmod -R, recursive.

– Pedro Lobito
yesterday











4 Answers
4






active

oldest

votes


















2














Try this:



$ sudo chmod 777 /home/pi/Documents/Images 


After you've done that, re-boot to check if that fixes it.

If not, try changing your crontab entry to this:



@reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1)


You should also consider adding a debug statement to your Python code to collect and save any errors that are thrown during execution.






share|improve this answer

























  • I thied this with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

    – SWoto
    yesterday












  • @SWoto: I'll edit my answer; check back shortly. In the meantime, what is the purpose of the stuff on your crontab: [Ctrl+X -> Y -> Enter] ?

    – Seamus
    yesterday











  • @Seamnu: i tried what u said and it didn't solve the problem. But i've some more info (i'll add it in the post too). The problem happens inside this funciton: gop.plotSetup(tbl[['Data',ts]]), right here f= plt.figure(figsize=(12, 9)). This is the first time using the variable 'f' and plt comes from import matplotlib.pyplot as plt. So the problem lies in the plt, not in the folter permission, because the saving step is the last thing inside the plotSetup function.

    – SWoto
    yesterday



















2














You have two problems: the problem of the file not being found, and the problem preventing you from debugging the first problem.



First let's make a general improvement. You have



try:
[...]
except OSError e:
pass


This means if the try part fails with OSError, it will just ignore it, tell you nothing about it, and carry on. At very least, log the error:



try:
[...]
except OSError e:
print(e)


Now when it goes wrong you should be able to find out why from the system logs (/var/log/syslog I think).



Now the real problem. I don't know what this gop thing is, and your extract doesn't show it, but you say it generates a file, which you indicate is in Images/Imagem.png -- although I suspect it's really in Documents/Images/Imagem.png. This is a relative path - relative to your current directory. When you load the file in the next line, you use an absolute path - relative to the filesystem root.



When you run the file as user pi you are probably doing so from /home/pi (or ~pi, which is equivalent), your file goes into /home/pi/Documents/Images/Imagem.png, the absolute and relative paths happen to match up, and the next line can find the file. However when you run it from crontab, it will have a different current directory. I don't know offhand what current directory crontab will give it, but there's no way it'll be /home/pi.



Either change gop (whatever that is) to put the file in an absolute location (I don't have the code to help with that), or change your code to read it from the same relative location:



bot.sendPhoto(chat_id,open('Documents/Images/Imagem.png','rb'))


Lastly, unless there is a good reason to run the script as root, don't. It should have the least privilege it requires to work. Just good practice.






share|improve this answer






























    1














    This might be a permission problem. When running under the user's (your) credentials it works and when under the crontab's credentials is does not.



    Try a test: WRT to your images, temporarily open permissions to all images files and the associated directory and see if the application works when run by the crontab.



    Don't leave the permissions opened to all as it is a security risk.






    share|improve this answer























    • I thied this ($ sudo chmod 777 /home/pi/Documents/Images ) with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

      – SWoto
      yesterday











    • There may also be an issue with the path you use and the path which is used when running a crontab job. But since you indicated the python script was running I didn't mention it. Also, use complete paths to files avoiding problems associated with variables like "$HOME" or paths which start with "~".

      – st2000
      yesterday











    • just eddited the post. I found that the problem lies here: f= plt.figure(figsize=(12, 9)), inside the plotSetup function. I tried the complete paths too, like u and Seamus said: reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1), but the problem persists.

      – SWoto
      yesterday


















    1














    like i said in the last edition that i made in the question...



    After adding the print sentence to some file after the exception, i got this:



    <class '_tkinter.TclError'>
    no display name and no $DISPLAY environment variable
    <traceback object at 0x6e3c8d50>


    Thit error led me to this post:



    _tkinter.TclError: no display name and no $DISPLAY environment variable



    that suggested to use this in the very beginning of the code:



    import matplotlib
    matplotlib.use('Agg')


    and then VOILA!! It's alive.



    Really appreciate all the help that you guys gave me, thanks @Seamus, @Mark Smith and @st2000!! ;p






    share|improve this answer








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      4 Answers
      4






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      4 Answers
      4






      active

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      active

      oldest

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      2














      Try this:



      $ sudo chmod 777 /home/pi/Documents/Images 


      After you've done that, re-boot to check if that fixes it.

      If not, try changing your crontab entry to this:



      @reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1)


      You should also consider adding a debug statement to your Python code to collect and save any errors that are thrown during execution.






      share|improve this answer

























      • I thied this with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

        – SWoto
        yesterday












      • @SWoto: I'll edit my answer; check back shortly. In the meantime, what is the purpose of the stuff on your crontab: [Ctrl+X -> Y -> Enter] ?

        – Seamus
        yesterday











      • @Seamnu: i tried what u said and it didn't solve the problem. But i've some more info (i'll add it in the post too). The problem happens inside this funciton: gop.plotSetup(tbl[['Data',ts]]), right here f= plt.figure(figsize=(12, 9)). This is the first time using the variable 'f' and plt comes from import matplotlib.pyplot as plt. So the problem lies in the plt, not in the folter permission, because the saving step is the last thing inside the plotSetup function.

        – SWoto
        yesterday
















      2














      Try this:



      $ sudo chmod 777 /home/pi/Documents/Images 


      After you've done that, re-boot to check if that fixes it.

      If not, try changing your crontab entry to this:



      @reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1)


      You should also consider adding a debug statement to your Python code to collect and save any errors that are thrown during execution.






      share|improve this answer

























      • I thied this with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

        – SWoto
        yesterday












      • @SWoto: I'll edit my answer; check back shortly. In the meantime, what is the purpose of the stuff on your crontab: [Ctrl+X -> Y -> Enter] ?

        – Seamus
        yesterday











      • @Seamnu: i tried what u said and it didn't solve the problem. But i've some more info (i'll add it in the post too). The problem happens inside this funciton: gop.plotSetup(tbl[['Data',ts]]), right here f= plt.figure(figsize=(12, 9)). This is the first time using the variable 'f' and plt comes from import matplotlib.pyplot as plt. So the problem lies in the plt, not in the folter permission, because the saving step is the last thing inside the plotSetup function.

        – SWoto
        yesterday














      2












      2








      2







      Try this:



      $ sudo chmod 777 /home/pi/Documents/Images 


      After you've done that, re-boot to check if that fixes it.

      If not, try changing your crontab entry to this:



      @reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1)


      You should also consider adding a debug statement to your Python code to collect and save any errors that are thrown during execution.






      share|improve this answer















      Try this:



      $ sudo chmod 777 /home/pi/Documents/Images 


      After you've done that, re-boot to check if that fixes it.

      If not, try changing your crontab entry to this:



      @reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1)


      You should also consider adding a debug statement to your Python code to collect and save any errors that are thrown during execution.







      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited yesterday

























      answered yesterday









      SeamusSeamus

      2,8071321




      2,8071321












      • I thied this with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

        – SWoto
        yesterday












      • @SWoto: I'll edit my answer; check back shortly. In the meantime, what is the purpose of the stuff on your crontab: [Ctrl+X -> Y -> Enter] ?

        – Seamus
        yesterday











      • @Seamnu: i tried what u said and it didn't solve the problem. But i've some more info (i'll add it in the post too). The problem happens inside this funciton: gop.plotSetup(tbl[['Data',ts]]), right here f= plt.figure(figsize=(12, 9)). This is the first time using the variable 'f' and plt comes from import matplotlib.pyplot as plt. So the problem lies in the plt, not in the folter permission, because the saving step is the last thing inside the plotSetup function.

        – SWoto
        yesterday


















      • I thied this with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

        – SWoto
        yesterday












      • @SWoto: I'll edit my answer; check back shortly. In the meantime, what is the purpose of the stuff on your crontab: [Ctrl+X -> Y -> Enter] ?

        – Seamus
        yesterday











      • @Seamnu: i tried what u said and it didn't solve the problem. But i've some more info (i'll add it in the post too). The problem happens inside this funciton: gop.plotSetup(tbl[['Data',ts]]), right here f= plt.figure(figsize=(12, 9)). This is the first time using the variable 'f' and plt comes from import matplotlib.pyplot as plt. So the problem lies in the plt, not in the folter permission, because the saving step is the last thing inside the plotSetup function.

        – SWoto
        yesterday

















      I thied this with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

      – SWoto
      yesterday






      I thied this with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

      – SWoto
      yesterday














      @SWoto: I'll edit my answer; check back shortly. In the meantime, what is the purpose of the stuff on your crontab: [Ctrl+X -> Y -> Enter] ?

      – Seamus
      yesterday





      @SWoto: I'll edit my answer; check back shortly. In the meantime, what is the purpose of the stuff on your crontab: [Ctrl+X -> Y -> Enter] ?

      – Seamus
      yesterday













      @Seamnu: i tried what u said and it didn't solve the problem. But i've some more info (i'll add it in the post too). The problem happens inside this funciton: gop.plotSetup(tbl[['Data',ts]]), right here f= plt.figure(figsize=(12, 9)). This is the first time using the variable 'f' and plt comes from import matplotlib.pyplot as plt. So the problem lies in the plt, not in the folter permission, because the saving step is the last thing inside the plotSetup function.

      – SWoto
      yesterday






      @Seamnu: i tried what u said and it didn't solve the problem. But i've some more info (i'll add it in the post too). The problem happens inside this funciton: gop.plotSetup(tbl[['Data',ts]]), right here f= plt.figure(figsize=(12, 9)). This is the first time using the variable 'f' and plt comes from import matplotlib.pyplot as plt. So the problem lies in the plt, not in the folter permission, because the saving step is the last thing inside the plotSetup function.

      – SWoto
      yesterday














      2














      You have two problems: the problem of the file not being found, and the problem preventing you from debugging the first problem.



      First let's make a general improvement. You have



      try:
      [...]
      except OSError e:
      pass


      This means if the try part fails with OSError, it will just ignore it, tell you nothing about it, and carry on. At very least, log the error:



      try:
      [...]
      except OSError e:
      print(e)


      Now when it goes wrong you should be able to find out why from the system logs (/var/log/syslog I think).



      Now the real problem. I don't know what this gop thing is, and your extract doesn't show it, but you say it generates a file, which you indicate is in Images/Imagem.png -- although I suspect it's really in Documents/Images/Imagem.png. This is a relative path - relative to your current directory. When you load the file in the next line, you use an absolute path - relative to the filesystem root.



      When you run the file as user pi you are probably doing so from /home/pi (or ~pi, which is equivalent), your file goes into /home/pi/Documents/Images/Imagem.png, the absolute and relative paths happen to match up, and the next line can find the file. However when you run it from crontab, it will have a different current directory. I don't know offhand what current directory crontab will give it, but there's no way it'll be /home/pi.



      Either change gop (whatever that is) to put the file in an absolute location (I don't have the code to help with that), or change your code to read it from the same relative location:



      bot.sendPhoto(chat_id,open('Documents/Images/Imagem.png','rb'))


      Lastly, unless there is a good reason to run the script as root, don't. It should have the least privilege it requires to work. Just good practice.






      share|improve this answer



























        2














        You have two problems: the problem of the file not being found, and the problem preventing you from debugging the first problem.



        First let's make a general improvement. You have



        try:
        [...]
        except OSError e:
        pass


        This means if the try part fails with OSError, it will just ignore it, tell you nothing about it, and carry on. At very least, log the error:



        try:
        [...]
        except OSError e:
        print(e)


        Now when it goes wrong you should be able to find out why from the system logs (/var/log/syslog I think).



        Now the real problem. I don't know what this gop thing is, and your extract doesn't show it, but you say it generates a file, which you indicate is in Images/Imagem.png -- although I suspect it's really in Documents/Images/Imagem.png. This is a relative path - relative to your current directory. When you load the file in the next line, you use an absolute path - relative to the filesystem root.



        When you run the file as user pi you are probably doing so from /home/pi (or ~pi, which is equivalent), your file goes into /home/pi/Documents/Images/Imagem.png, the absolute and relative paths happen to match up, and the next line can find the file. However when you run it from crontab, it will have a different current directory. I don't know offhand what current directory crontab will give it, but there's no way it'll be /home/pi.



        Either change gop (whatever that is) to put the file in an absolute location (I don't have the code to help with that), or change your code to read it from the same relative location:



        bot.sendPhoto(chat_id,open('Documents/Images/Imagem.png','rb'))


        Lastly, unless there is a good reason to run the script as root, don't. It should have the least privilege it requires to work. Just good practice.






        share|improve this answer

























          2












          2








          2







          You have two problems: the problem of the file not being found, and the problem preventing you from debugging the first problem.



          First let's make a general improvement. You have



          try:
          [...]
          except OSError e:
          pass


          This means if the try part fails with OSError, it will just ignore it, tell you nothing about it, and carry on. At very least, log the error:



          try:
          [...]
          except OSError e:
          print(e)


          Now when it goes wrong you should be able to find out why from the system logs (/var/log/syslog I think).



          Now the real problem. I don't know what this gop thing is, and your extract doesn't show it, but you say it generates a file, which you indicate is in Images/Imagem.png -- although I suspect it's really in Documents/Images/Imagem.png. This is a relative path - relative to your current directory. When you load the file in the next line, you use an absolute path - relative to the filesystem root.



          When you run the file as user pi you are probably doing so from /home/pi (or ~pi, which is equivalent), your file goes into /home/pi/Documents/Images/Imagem.png, the absolute and relative paths happen to match up, and the next line can find the file. However when you run it from crontab, it will have a different current directory. I don't know offhand what current directory crontab will give it, but there's no way it'll be /home/pi.



          Either change gop (whatever that is) to put the file in an absolute location (I don't have the code to help with that), or change your code to read it from the same relative location:



          bot.sendPhoto(chat_id,open('Documents/Images/Imagem.png','rb'))


          Lastly, unless there is a good reason to run the script as root, don't. It should have the least privilege it requires to work. Just good practice.






          share|improve this answer













          You have two problems: the problem of the file not being found, and the problem preventing you from debugging the first problem.



          First let's make a general improvement. You have



          try:
          [...]
          except OSError e:
          pass


          This means if the try part fails with OSError, it will just ignore it, tell you nothing about it, and carry on. At very least, log the error:



          try:
          [...]
          except OSError e:
          print(e)


          Now when it goes wrong you should be able to find out why from the system logs (/var/log/syslog I think).



          Now the real problem. I don't know what this gop thing is, and your extract doesn't show it, but you say it generates a file, which you indicate is in Images/Imagem.png -- although I suspect it's really in Documents/Images/Imagem.png. This is a relative path - relative to your current directory. When you load the file in the next line, you use an absolute path - relative to the filesystem root.



          When you run the file as user pi you are probably doing so from /home/pi (or ~pi, which is equivalent), your file goes into /home/pi/Documents/Images/Imagem.png, the absolute and relative paths happen to match up, and the next line can find the file. However when you run it from crontab, it will have a different current directory. I don't know offhand what current directory crontab will give it, but there's no way it'll be /home/pi.



          Either change gop (whatever that is) to put the file in an absolute location (I don't have the code to help with that), or change your code to read it from the same relative location:



          bot.sendPhoto(chat_id,open('Documents/Images/Imagem.png','rb'))


          Lastly, unless there is a good reason to run the script as root, don't. It should have the least privilege it requires to work. Just good practice.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 18 hours ago









          Mark SmithMark Smith

          97249




          97249





















              1














              This might be a permission problem. When running under the user's (your) credentials it works and when under the crontab's credentials is does not.



              Try a test: WRT to your images, temporarily open permissions to all images files and the associated directory and see if the application works when run by the crontab.



              Don't leave the permissions opened to all as it is a security risk.






              share|improve this answer























              • I thied this ($ sudo chmod 777 /home/pi/Documents/Images ) with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

                – SWoto
                yesterday











              • There may also be an issue with the path you use and the path which is used when running a crontab job. But since you indicated the python script was running I didn't mention it. Also, use complete paths to files avoiding problems associated with variables like "$HOME" or paths which start with "~".

                – st2000
                yesterday











              • just eddited the post. I found that the problem lies here: f= plt.figure(figsize=(12, 9)), inside the plotSetup function. I tried the complete paths too, like u and Seamus said: reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1), but the problem persists.

                – SWoto
                yesterday















              1














              This might be a permission problem. When running under the user's (your) credentials it works and when under the crontab's credentials is does not.



              Try a test: WRT to your images, temporarily open permissions to all images files and the associated directory and see if the application works when run by the crontab.



              Don't leave the permissions opened to all as it is a security risk.






              share|improve this answer























              • I thied this ($ sudo chmod 777 /home/pi/Documents/Images ) with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

                – SWoto
                yesterday











              • There may also be an issue with the path you use and the path which is used when running a crontab job. But since you indicated the python script was running I didn't mention it. Also, use complete paths to files avoiding problems associated with variables like "$HOME" or paths which start with "~".

                – st2000
                yesterday











              • just eddited the post. I found that the problem lies here: f= plt.figure(figsize=(12, 9)), inside the plotSetup function. I tried the complete paths too, like u and Seamus said: reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1), but the problem persists.

                – SWoto
                yesterday













              1












              1








              1







              This might be a permission problem. When running under the user's (your) credentials it works and when under the crontab's credentials is does not.



              Try a test: WRT to your images, temporarily open permissions to all images files and the associated directory and see if the application works when run by the crontab.



              Don't leave the permissions opened to all as it is a security risk.






              share|improve this answer













              This might be a permission problem. When running under the user's (your) credentials it works and when under the crontab's credentials is does not.



              Try a test: WRT to your images, temporarily open permissions to all images files and the associated directory and see if the application works when run by the crontab.



              Don't leave the permissions opened to all as it is a security risk.







              share|improve this answer












              share|improve this answer



              share|improve this answer










              answered yesterday









              st2000st2000

              36414




              36414












              • I thied this ($ sudo chmod 777 /home/pi/Documents/Images ) with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

                – SWoto
                yesterday











              • There may also be an issue with the path you use and the path which is used when running a crontab job. But since you indicated the python script was running I didn't mention it. Also, use complete paths to files avoiding problems associated with variables like "$HOME" or paths which start with "~".

                – st2000
                yesterday











              • just eddited the post. I found that the problem lies here: f= plt.figure(figsize=(12, 9)), inside the plotSetup function. I tried the complete paths too, like u and Seamus said: reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1), but the problem persists.

                – SWoto
                yesterday

















              • I thied this ($ sudo chmod 777 /home/pi/Documents/Images ) with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

                – SWoto
                yesterday











              • There may also be an issue with the path you use and the path which is used when running a crontab job. But since you indicated the python script was running I didn't mention it. Also, use complete paths to files avoiding problems associated with variables like "$HOME" or paths which start with "~".

                – st2000
                yesterday











              • just eddited the post. I found that the problem lies here: f= plt.figure(figsize=(12, 9)), inside the plotSetup function. I tried the complete paths too, like u and Seamus said: reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1), but the problem persists.

                – SWoto
                yesterday
















              I thied this ($ sudo chmod 777 /home/pi/Documents/Images ) with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

              – SWoto
              yesterday





              I thied this ($ sudo chmod 777 /home/pi/Documents/Images ) with no success. =/. Also changed the crontab code to: @reboot python3 /home/pi/Documents/telegrambot.py & /home/pi/Desktop/log.txt >&1 to get some error log, but nothing happened.

              – SWoto
              yesterday













              There may also be an issue with the path you use and the path which is used when running a crontab job. But since you indicated the python script was running I didn't mention it. Also, use complete paths to files avoiding problems associated with variables like "$HOME" or paths which start with "~".

              – st2000
              yesterday





              There may also be an issue with the path you use and the path which is used when running a crontab job. But since you indicated the python script was running I didn't mention it. Also, use complete paths to files avoiding problems associated with variables like "$HOME" or paths which start with "~".

              – st2000
              yesterday













              just eddited the post. I found that the problem lies here: f= plt.figure(figsize=(12, 9)), inside the plotSetup function. I tried the complete paths too, like u and Seamus said: reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1), but the problem persists.

              – SWoto
              yesterday





              just eddited the post. I found that the problem lies here: f= plt.figure(figsize=(12, 9)), inside the plotSetup function. I tried the complete paths too, like u and Seamus said: reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1), but the problem persists.

              – SWoto
              yesterday











              1














              like i said in the last edition that i made in the question...



              After adding the print sentence to some file after the exception, i got this:



              <class '_tkinter.TclError'>
              no display name and no $DISPLAY environment variable
              <traceback object at 0x6e3c8d50>


              Thit error led me to this post:



              _tkinter.TclError: no display name and no $DISPLAY environment variable



              that suggested to use this in the very beginning of the code:



              import matplotlib
              matplotlib.use('Agg')


              and then VOILA!! It's alive.



              Really appreciate all the help that you guys gave me, thanks @Seamus, @Mark Smith and @st2000!! ;p






              share|improve this answer








              New contributor




              SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
              Check out our Code of Conduct.
























                1














                like i said in the last edition that i made in the question...



                After adding the print sentence to some file after the exception, i got this:



                <class '_tkinter.TclError'>
                no display name and no $DISPLAY environment variable
                <traceback object at 0x6e3c8d50>


                Thit error led me to this post:



                _tkinter.TclError: no display name and no $DISPLAY environment variable



                that suggested to use this in the very beginning of the code:



                import matplotlib
                matplotlib.use('Agg')


                and then VOILA!! It's alive.



                Really appreciate all the help that you guys gave me, thanks @Seamus, @Mark Smith and @st2000!! ;p






                share|improve this answer








                New contributor




                SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                Check out our Code of Conduct.






















                  1












                  1








                  1







                  like i said in the last edition that i made in the question...



                  After adding the print sentence to some file after the exception, i got this:



                  <class '_tkinter.TclError'>
                  no display name and no $DISPLAY environment variable
                  <traceback object at 0x6e3c8d50>


                  Thit error led me to this post:



                  _tkinter.TclError: no display name and no $DISPLAY environment variable



                  that suggested to use this in the very beginning of the code:



                  import matplotlib
                  matplotlib.use('Agg')


                  and then VOILA!! It's alive.



                  Really appreciate all the help that you guys gave me, thanks @Seamus, @Mark Smith and @st2000!! ;p






                  share|improve this answer








                  New contributor




                  SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.










                  like i said in the last edition that i made in the question...



                  After adding the print sentence to some file after the exception, i got this:



                  <class '_tkinter.TclError'>
                  no display name and no $DISPLAY environment variable
                  <traceback object at 0x6e3c8d50>


                  Thit error led me to this post:



                  _tkinter.TclError: no display name and no $DISPLAY environment variable



                  that suggested to use this in the very beginning of the code:



                  import matplotlib
                  matplotlib.use('Agg')


                  and then VOILA!! It's alive.



                  Really appreciate all the help that you guys gave me, thanks @Seamus, @Mark Smith and @st2000!! ;p







                  share|improve this answer








                  New contributor




                  SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.









                  share|improve this answer



                  share|improve this answer






                  New contributor




                  SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.









                  answered 4 hours ago









                  SWotoSWoto

                  111




                  111




                  New contributor




                  SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.





                  New contributor





                  SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.






                  SWoto is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.




















                      SWoto is a new contributor. Be nice, and check out our Code of Conduct.









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                      SWoto is a new contributor. Be nice, and check out our Code of Conduct.












                      SWoto is a new contributor. Be nice, and check out our Code of Conduct.











                      SWoto is a new contributor. Be nice, and check out our Code of Conduct.














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