#NEWLINE# def render( engine , format , filepath ) : #NEWLINE# #INDENT# "Render file with Graphviz engine into format,  return result filename.\n\n    Args:\n        engine: The layout commmand used for rendering ('dot', 'neato', ...).\n        format: The output format used for rendering ('pdf', 'png', ...).\n        filepath: Path to the DOT source file to render.\n    Returns:\n        The (possibly relative) path of the rendered file.\n    Raises:\n        RuntimeError: If the Graphviz executable is not found.\n    " #NEWLINE# ( args , rendered ) = command ( engine , format , filepath ) #NEWLINE# try : #NEWLINE# #INDENT# subprocess . call ( args , startupinfo = STARTUPINFO ) #NEWLINE# #UNINDENT# except OSError as e : #NEWLINE# #INDENT# if ( engine . errno == errno . ENOENT ) : #NEWLINE# #INDENT# raise RuntimeError ( ( "failed to execute %r, make sure the Graphviz executables are on your systems' path" % args ) ) #NEWLINE# #UNINDENT# else : #NEWLINE# #INDENT# raise #NEWLINE# #UNINDENT# #UNINDENT# return rendered