text: Run error " module 'matplotlib' has no attribute 'cbook' "
  Hello. I am bigginer of pythonista3.
  I would like to run python code bellow,
  ・py code
  import matplotlib.pyplot as plt
  but, run error.
  module 'matplotlib' has no attribute 'cbook'
  How can I do for this problem ?
  Could you let me know.
  My environment is,
  ・pythonista3、stash、icloud Drive
  ・iOs12、iphoneXR
  try force quitting pythonista, and trying again. matplotlib takes a long time to import, and it you cancel while it is loading, things get screwy. force quit the app, and it should be workng again.
  also, since i see you are using stash, make sure you never tried to install matplotlib on your own.
  Dear JonB
  Thank you for kindness.
  I remove python code, and import new.
  I successed for running.
  Thanks a lot.