Jupyter Notebook

When running Jupyter Notebook sessions, Python can behave differently than when run from a script on in a terminal session.

Display Issues

When trying to plot something I get the error:

ImportError: Cannot load backend 'qtagg' which requires the 'qt' interactive framework, as 'headless' is currently running

This occurs because the Jupyter session has no access to a desktop environment with which to open a separate window. There are several solutions to this issue, depending on what your requirements are.

• For displaying plots inline in the notebook, either install the Python module 'matplotlib-inline' and then import matplotlib modules with 'import matplotlib-inline'
  or
  Put the following in a cell and execute it:
  %matplotlib inline
  or specify the backend in your code:
  import matplotlibmatplotlib.use('module://matplotlib_inline.backend_inline')
• For writing output to files without displaying use:
  
  matplotlib.use('Agg')