code: def get_api_items(api_doc_fd):
      
      current_module = 'pandas'
      previous_line = current_section = current_subsection = ''
      position = None
      for line in api_doc_fd:
          line = line.strip()
          if len(line) == len(previous_line):
              if set(line) == set('-'):
                  current_section = previous_line
                  continue
              if set(line) == set('~'):
                  current_subsection = previous_line
                  continue
  
          if line.startswith('.. currentmodule::'):
              current_module = line.replace('.. currentmodule::', '').strip()
              continue
  
          if line == '.. autosummary::':
              position = 'autosummary'
              continue
  
          if position == 'autosummary':
              if line == '':
                  position = 'items'
                  continue
  
          if position == 'items':
              if line == '':
                  position = None
                  continue
              item = line.strip()
              func = importlib.import_module(current_module)
              for part in item.split('.'):
                  func = getattr(func, part)
  
              yield ('.'.join([current_module, item]), func,
                     current_section, current_subsection)
  
          previous_line = line
docs: Yield information about all public API items.
  
      Parse api.rst file from the documentation, and extract all the functions,
      methods, classes, attributes... This should include all pandas public API.
  
      Parameters
      ----------
      api_doc_fd : file descriptor
          A file descriptor of the API documentation page, containing the table
          of contents with all the public API.
  
      Yields
      ------
      name : str
          The name of the object (e.g. 'pandas.Series.str.upper).
      func : function
          The object itself. In most cases this will be a function or method,
          but it can also be classes, properties, cython objects...
      section : str
          The name of the section in the API page where the object item is
          located.
      subsection : str
          The name of the subsection in the API page where the object item is
          located.