docs: def convert_ipynb_to_gallery(file_name):
      """
      Blatantly stolen + adapted from
      https://gist.github.com/wuhuikai/4a7ceb8bc52454e17a4eb8327d538d85
  
      """
      python_file = ""
  
      nb_dict = json.load(open(file_name))
      cells = nb_dict['cells']
  
      for i, cell in enumerate(cells):
          if i == 0:
              assert cell['cell_type'] == 'markdown', \
                  'First cell has to be markdown'
  
              md_source = ''.join(cell['source'])
              rst_source = pdoc.convert_text(md_source, 'rst', 'md')
              python_file = '"""\n' + rst_source + '\n"""'
          else:
              if cell['cell_type'] == 'markdown':
                  md_source = ''.join(cell['source'])
                  rst_source = pdoc.convert_text(md_source, 'rst', 'md')
                  commented_source = '\n'.join([
                      '# ' + x for x in rst_source.split('\n')
                  ])
                  python_file = python_file + '\n\n\n' + '#' * 70 + '\n' + \
                      commented_source
              elif cell['cell_type'] == 'code':
                  source = ''.join(cell['source'])
                  python_file = python_file + '\n' * 2 + source
  
      open(file_name.replace('.ipynb', '.py'), 'w').write(python_file)