web.py 文件源码

def __init__(self, pattern, handler_class, kwargs={}, name=None):
        """Creates a URLSpec.

        Parameters:
        pattern: Regular expression to be matched.  Any groups in the regex
            will be passed in to the handler's get/post/etc methods as
            arguments.
        handler_class: RequestHandler subclass to be invoked.
        kwargs (optional): A dictionary of additional arguments to be passed
            to the handler's constructor.
        name (optional): A name for this handler.  Used by
            Application.reverse_url.
        """
        if not pattern.endswith('$'):
            pattern += '$'

        self.regex = re.compile(pattern)    # ????
        self.handler_class = handler_class
        self.kwargs = kwargs
        self.name = name
        self._path, self._group_count = self._find_groups()