parameters: (self, filename=None, directory=None)
return_statement: return filepath
docstring: Save the DOT source to file. Ensure the file ends with a newline.
  
          Args:
              filename: Filename for saving the source (defaults to ``name`` + ``'.gv'``)
              directory: (Sub)directory for source saving and rendering.
  
          Returns:
              The (possibly relative) path of the saved source file.
docstring_summary: Save the DOT source to file. Ensure the file ends with a newline.
docstring_tokens: Save the DOT source to file . Ensure the file ends with a newline .
function: def save(self, filename=None, directory=None):
          """Save the DOT source to file. Ensure the file ends with a newline.
  
          Args:
              filename: Filename for saving the source (defaults to ``name`` + ``'.gv'``)
              directory: (Sub)directory for source saving and rendering.
  
          Returns:
              The (possibly relative) path of the saved source file.
          """
          if filename is not None:
              self.filename = filename
          if directory is not None:
              self.directory = directory
  
          filepath = self.filepath
          tools.mkdirs(filepath)
  
          data = text_type(self.source)
  
          log.debug('write %d bytes to %r', len(data), filepath)
          with io.open(filepath, 'w', encoding=self.encoding) as fd:
              fd.write(data)
              if not data.endswith(u'\n'):
                  fd.write(u'\n')
  
          return filepath
function_tokens: def save ( self , filename = None , directory = None ) : if filename is not None : self . filename = filename if directory is not None : self . directory = directory filepath = self . filepath tools . mkdirs ( filepath ) data = text_type ( self . source ) log . debug ( 'write %d bytes to %r' , len ( data ) , filepath ) with io . open ( filepath , 'w' , encoding = self . encoding ) as fd : fd . write ( data ) if not data . endswith ( u'\n' ) : fd . write ( u'\n' ) return filepath