Error when running rsumpwebchart.py after upgrade to Raspbian Buster

[fitig]

When I run: /usr/local/bin/rsumpwebchart.py

I get: /usr/lib/python3/dist-packages/matplotlib/cbook/__init__.py:424: MatplotlibDeprecationWarning: Passing one of 'on', 'true', 'off', 'false' as a boolean is deprecated; use an actual boolean (True/False) instead. warn_deprecated("2.2", "Passing one of 'on', 'true', 'off', 'false' as a " Traceback (most recent call last): File "/usr/local/bin/rsumpwebchart.py", line 25, in <module> main() File "/usr/local/bin/rsumpwebchart.py", line 21, in main webchart.create_chart(homedir) File "/usr/local/lib/python3.7/dist-packages/raspisump/webchart.py", line 36, in create_chart todaychart.graph(csv_file, filename, bytes2str) File "/usr/local/lib/python3.7/dist-packages/raspisump/todaychart.py", line 100, in graph plt.savefig(filename, dpi=72) File "/usr/lib/python3/dist-packages/matplotlib/pyplot.py", line 689, in savefig res = fig.savefig(*args, **kwargs) File "/usr/lib/python3/dist-packages/matplotlib/figure.py", line 2094, in savefig self.canvas.print_figure(fname, **kwargs) File "/usr/lib/python3/dist-packages/matplotlib/backend_bases.py", line 2075, in print_figure **kwargs) File "/usr/lib/python3/dist-packages/matplotlib/backends/backend_agg.py", line 521, in print_png cbook.open_file_cm(filename_or_obj, "wb") as fh: File "/usr/lib/python3.7/contextlib.py", line 112, in __enter__ return next(self.gen) File "/usr/lib/python3/dist-packages/matplotlib/cbook/__init__.py", line 407, in open_file_cm fh, opened = to_filehandle(path_or_file, mode, True, encoding) File "/usr/lib/python3/dist-packages/matplotlib/cbook/__init__.py", line 392, in to_filehandle fh = open(fname, flag, encoding=encoding) PermissionError: [Errno 13] Permission denied: '/home/pi/raspi-sump/charts/today.png'

[alaudet]

Must be something during install.

Do the following.

sudo pip3 uninstall raspisump  
sudo pip3 install --no-binary :all: raspisump

uninstalling will preserve your raspi-sump folder in /home/pi and your conf file.

[alaudet]

assuming it worked so closing the issue. reply to this issue if you want to reopen.

[ctktfg]

Sorry for the delay. After running the commands above, I now get the following error:

/usr/lib/python3/dist-packages/matplotlib/cbook/__init__.py:424: MatplotlibDeprecationWarning: 
Passing one of 'on', 'true', 'off', 'false' as a boolean is deprecated; use an actual boolean (True/False) instead.
  warn_deprecated("2.2", "Passing one of 'on', 'true', 'off', 'false' as a "

[alaudet]

That is just a deprecation warning from Matplotlib, the graphing library used for creating the charts. Its saying that code should start using True/False statements instead of on/off ones. Buster uses a later version of matplotlib. The code still works though, and your chart should be created. I will make changes to the charting code in the future to use True/False statements instead of on/off but the deprecation warnings will not affect output for now.

[fitig]

So the problem is, this is run from a cron job and the output of the cron job is emailed if there are any warnings or errors. So when it throws this warning, sends an email each time. I could turn off emails but then the rest of my cron jobs would suffer. Is there any way to point me to the type of code I should be looking for and I'll just change it to a true/false statement (assume that I don't know Python but that I can hunt through code and do a search and replace with the best of them :) ).

[alaudet]

Are you sending the output of that one crontab entry to /dev/null.

For example

30 * * * * /your/command.sh >/dev/null 2>&1

[fitig]

Oh that's a great idea. I did that and everything is good. Also I won't get those rare emails when it gets a screwy reading from the sensor. Thanks (again)!

[alaudet]

Cheers :-)