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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
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
New contributor
|
show 2 more comments
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 $DISPLAY environment variable
this post suggested use this in the very beginning of the code:
import matplotlib
matplotlib.use('Agg')
and then VOILA!! It's alive.
Really appreciate all the help that you guys gave me, thanks! ;p
raspbian pi-3 python boot
New contributor
Does thisgop.PlotSetup
generate a picture and store it on disk?
– Mark Smith
yesterday
Edit the crontab without "sudo":$ 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
|
show 2 more comments
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
New contributor
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 $DISPLAY environment variable
this post suggested use this in the very beginning of the code:
import matplotlib
matplotlib.use('Agg')
and then VOILA!! It's alive.
Really appreciate all the help that you guys gave me, thanks! ;p
raspbian pi-3 python boot
raspbian pi-3 python boot
New contributor
New contributor
edited 3 hours ago
SWoto
New contributor
asked yesterday
SWotoSWoto
192
192
New contributor
New contributor
Does thisgop.PlotSetup
generate a picture and store it on disk?
– Mark Smith
yesterday
Edit the crontab without "sudo":$ 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
|
show 2 more comments
Does thisgop.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
|
show 2 more comments
4 Answers
4
active
oldest
votes
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.
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
add a comment |
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.
add a comment |
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.
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
add a comment |
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
New contributor
add a comment |
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4 Answers
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active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
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.
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
add a comment |
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.
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
add a comment |
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.
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.
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
add a comment |
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
add a comment |
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.
add a comment |
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.
add a comment |
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.
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.
answered 16 hours ago
Mark SmithMark Smith
97249
97249
add a comment |
add a comment |
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.
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 "$HOME" or paths which start with "~".
– st2000
yesterday
just eddited the post. I found that the problem lies here: f= plt.figure(figsize=(12, 9)), inside the plotSetup function. I tried the complete paths too, like u and Seamus said: reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1), but the problem persists.
– SWoto
yesterday
add a comment |
This might be a permission problem. When running under the user's (your) credentials it works and when under the crontab's credentials is does not.
Try a test: WRT to your images, temporarily open permissions to all images files and the associated directory and see if the application works when run by the crontab.
Don't leave the permissions opened to all as it is a security risk.
I thied this ($ 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 "$HOME" or paths which start with "~".
– st2000
yesterday
just eddited the post. I found that the problem lies here: f= plt.figure(figsize=(12, 9)), inside the plotSetup function. I tried the complete paths too, like u and Seamus said: reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1), but the problem persists.
– SWoto
yesterday
add a comment |
This might be a permission problem. When running under the user's (your) credentials it works and when under the crontab's credentials is does not.
Try a test: WRT to your images, temporarily open permissions to all images files and the associated directory and see if the application works when run by the crontab.
Don't leave the permissions opened to all as it is a security risk.
This might be a permission problem. When running under the user's (your) credentials it works and when under the crontab's credentials is does not.
Try a test: WRT to your images, temporarily open permissions to all images files and the associated directory and see if the application works when run by the crontab.
Don't leave the permissions opened to all as it is a security risk.
answered yesterday
st2000st2000
36414
36414
I thied this ($ 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 "$HOME" or paths which start with "~".
– st2000
yesterday
just eddited the post. I found that the problem lies here: f= plt.figure(figsize=(12, 9)), inside the plotSetup function. I tried the complete paths too, like u and Seamus said: reboot ( /bin/sleep 30; /usr/bin/sudo /usr/bin/python3 /home/pi/Documents/telegrambot.py >> /home/pi/Desktop/log.txt 2>&1), but the problem persists.
– SWoto
yesterday
add a comment |
I thied this ($ 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
add a comment |
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
New contributor
add a comment |
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
New contributor
add a comment |
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
New contributor
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
New contributor
New contributor
answered 3 hours ago
SWotoSWoto
111
111
New contributor
New contributor
add a comment |
add a comment |
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.
SWoto is a new contributor. Be nice, and check out our Code of Conduct.
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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