pyplot dont work :/
I don't understand why this program is not working.
It returns :
"Matplotlib created a temporary config/cache directory at /tmp/matplotlib-w284fve3 because the default path (/config/matplotlib) is not a writable directory; it is highly recommended to set the MPLCONFIGDIR environment variable to a writable directory, in particular to speed up the import of Matplotlib and to better support multiprocessing."
I tried to add matplolib from the "packages" on the left but it changed nothing.