pythonrc.py 文件源码

def process_edit_cmd(self, arg=''):
        """{EDIT_CMD} [object|filename]

        Open {EDITOR} with session history, provided filename or
        object's source file.

        - without arguments, a temporary file containing session history is
          created and opened in {EDITOR}. On quitting the editor, all
          the non commented lines in the file are executed.

        - with a filename argument, the file is opened in the editor. On
          close, you are returned bay to the interpreter.

        - with an object name argument, an attempt is made to lookup the
          source file of the object and it is opened if found. Else the
          argument is treated as a filename.
        """
        line_num_opt = ''
        if arg:
            obj = self.lookup(arg)
            try:
                if obj:
                    filename = inspect.getsourcefile(obj)
                    _, line_no = inspect.getsourcelines(obj)
                    line_num_opt = config['LINE_NUM_OPT'].format(line_no=line_no)
                else:
                    filename = arg

            except (IOError, TypeError, NameError) as e:
                return self.writeline(e)
        else:
            # - make a list of all lines in session history, commenting
            # any non-blank lines.
            filename = self._mktemp_buffer("# {}".format(line) if line else ''
                                           for line in (line.strip('\n') for line in self.session_history))

        # - shell out to the editor
        os.system('{} {} {}'.format(config['EDITOR'], line_num_opt, filename))

        # - if arg was not provided (we edited session history), execute
        # it in the current namespace
        if not arg:
            self._exec_from_file(filename)
            os.unlink(filename)