code: def load_font(prefix, ttf_filename, charmap_filename, directory=None):
      
      return _instance().load_font(prefix, ttf_filename, charmap_filename, directory)
docs: Loads a font file and the associated charmap.
  
      If ``directory`` is None, the files will be looked for in ``./fonts/``.
  
      Parameters
      ----------
      prefix: str
          Prefix string to be used when accessing a given font set
      ttf_filename: str
          Ttf font filename
      charmap_filename: str
          Character map filename
      directory: str or None, optional
          Directory for font and charmap files
  
      Example
      -------
      The spyder ide uses qtawesome and uses a custom font for spyder-specific
      icons::
  
          qta.load_font('spyder', 'spyder.ttf', 'spyder-charmap.json')