def write_data(self, output):
        """Write the data out as base64 binary
        
        Args:
          output (file-like object): Output to write figure to.
        """
        if self.figure:
            canvas = FigureCanvas(self.figure)
            self.figure.savefig(output, format='png', bbox_inches='tight')
            output.seek(0)
            return output.getvalue()
        return None
def write_data ( self , output ) : if self . figure : canvas = FigureCanvas ( self . figure ) self . figure . savefig ( output , format = 'png' , bbox_inches = 'tight' ) output . seek ( 0 ) return output . getvalue ( ) return None
Write the data out as base64 binary
        
        Args:
          output (file-like object): Output to write figure to.