通过这样，找到源代码，请自己看方法文档

IffinalisFalse, parse callbacks will not be run.

This is useful for applications that wish to combine configurations from multiple sources.

def parse_command_line(self, args=None, final=True): """Parses all options given on the command line (defaults to `sys.argv`). Note that ``args[0]`` is ignored since it is the program name in `sys.argv`. We return a list of all arguments that are not parsed as options. If ``final`` is ``False``, parse callbacks will not be run. This is useful for applications that wish to combine configurations from multiple sources. """ if args is None: args = sys.argv remaining = [] for i in range(1, len(args)): # All things after the last option are command line arguments if not args[i].startswith("-"): remaining = args[i:] break if args[i] == "--": remaining = args[i + 1:] break arg = args[i].lstrip("-") name, equals, value = arg.partition("=") name = self._normalize_name(name) if name not in self._options: self.print_help() raise Error('Unrecognized command line option: %r' % name) option = self._options[name] if not equals: if option.type == bool: value = "true" else: raise Error('Option %r requires a value' % name) option.parse(value) if final: self.run_parse_callbacks() return remaining