Python urllib3 模块，exceptions() 实例源码

def __call__(self, url, method='GET', body=None, headers=None,
                 timeout=None, **kwargs):
        """Make an HTTP request using urllib3.

        Args:
            url (str): The URI to be requested.
            method (str): The HTTP method to use for the request. Defaults
                to 'GET'.
            body (bytes): The payload / body in HTTP request.
            headers (Mapping[str, str]): Request headers.
            timeout (Optional[int]): The number of seconds to wait for a
                response from the server. If not specified or if None, the
                urllib3 default timeout will be used.
            kwargs: Additional arguments passed throught to the underlying
                urllib3 :meth:`urlopen` method.

        Returns:
            google.auth.transport.Response: The HTTP response.

        Raises:
            google.auth.exceptions.TransportError: If any exception occurred.
        """
        # urllib3 uses a sentinel default value for timeout, so only set it if
        # specified.
        if timeout is not None:
            kwargs['timeout'] = timeout

        try:
            _LOGGER.debug('Making request: %s %s', method, url)
            response = self.http.request(
                method, url, body=body, headers=headers, **kwargs)
            return _Response(response)
        except urllib3.exceptions.HTTPError as caught_exc:
            new_exc = exceptions.TransportError(caught_exc)
            six.raise_from(new_exc, caught_exc)