def compile_path(
    path: str
) -> typing.Tuple[typing.Pattern, str, typing.Dict[str, Convertor]]:
    """
    Given a path string, like: "/{username:str}", return a three-tuple
    of (regex, format, {param_name:convertor}).

    regex:      "/(?P<username>[^/]+)"
    format:     "/{username}"
    convertors: {"username": StringConvertor()}
    """
    path_regex = "^"
    path_format = ""

    idx = 0
    param_convertors = {}
    for match in PARAM_REGEX.finditer(path):
        param_name, convertor_type = match.groups("str")
        convertor_type = convertor_type.lstrip(":")
        assert (
            convertor_type in CONVERTOR_TYPES
        ), f"Unknown path convertor '{convertor_type}'"
        convertor = CONVERTOR_TYPES[convertor_type]

        path_regex += path[idx : match.start()]
        path_regex += f"(?P<{param_name}>{convertor.regex})"

        path_format += path[idx : match.start()]
        path_format += "{%s}" % param_name

        param_convertors[param_name] = convertor

        idx = match.end()

    path_regex += path[idx:] + "$"
    path_format += path[idx:]

    return re.compile(path_regex), path_format, param_convertors
def compile_path(
    path: str
) -> typing.Tuple[typing.Pattern, str, typing.Dict[str, Convertor]]:
    """
    Given a path string, like: "/{username:str}", return a three-tuple
    of (regex, format, {param_name:convertor}).

    regex:      "/(?P<username>[^/]+)"
    format:     "/{username}"
    convertors: {"username": StringConvertor()}
    """
    path_regex = "^"
    path_format = ""

    idx = 0
    param_convertors = {}
    for match in PARAM_REGEX.finditer(path):
        param_name, convertor_type = match.groups("str")
        convertor_type = convertor_type.lstrip(":")
        assert (
            convertor_type in CONVERTOR_TYPES
        ), f"Unknown path convertor '{convertor_type}'"
        convertor = CONVERTOR_TYPES[convertor_type]

        path_regex += path[idx : match.start()]
        path_regex += f"(?P<{param_name}>{convertor.regex})"

        path_format += path[idx : match.start()]
        path_format += "{%s}" % param_name

        param_convertors[param_name] = convertor

        idx = match.end()

    path_regex += path[idx:] + "$"
    path_format += path[idx:]

    return re.compile(path_regex), path_format, param_convertors
def compile_path ( path : str ) -> typing . Tuple [ typing . Pattern , str , typing . Dict [ str , Convertor ] ] : path_regex = "^" path_format = "" idx = 0 param_convertors = { } for match in PARAM_REGEX . finditer ( path ) : param_name , convertor_type = match . groups ( "str" ) convertor_type = convertor_type . lstrip ( ":" ) assert ( convertor_type in CONVERTOR_TYPES ) , f"Unknown path convertor '{convertor_type}'" convertor = CONVERTOR_TYPES [ convertor_type ] path_regex += path [ idx : match . start ( ) ] path_regex += f"(?P<{param_name}>{convertor.regex})" path_format += path [ idx : match . start ( ) ] path_format += "{%s}" % param_name param_convertors [ param_name ] = convertor idx = match . end ( ) path_regex += path [ idx : ] + "$" path_format += path [ idx : ] return re . compile ( path_regex ) , path_format , param_convertors
Given a path string, like: "/{username:str}", return a three-tuple
    of (regex, format, {param_name:convertor}).

    regex:      "/(?P<username>[^/]+)"
    format:     "/{username}"
    convertors: {"username": StringConvertor()}
Given a path string like : / { username : str } return a three - tuple of ( regex format { param_name : convertor } ) .