72 def urlopen(url, data=None, proxies=None, context=None):  argument
90 def urlretrieve(url, filename=None, reporthook=None, data=None, context=None):  argument
183     def open(self, fullurl, data=None):  argument
219     def open_unknown(self, fullurl, data=None):  argument
224     def open_unknown_proxy(self, proxy, fullurl, data=None):  argument
230     def retrieve(self, url, filename=None, reporthook=None, data=None):  argument
295     def open_http(self, url, data=None):  argument
368     def http_error(self, url, fp, errcode, errmsg, headers, data=None):  argument
389         def open_https(self, url, data=None):  argument
570     def open_data(self, url, data=None):  argument
629     def http_error_302(self, url, fp, errcode, errmsg, headers, data=None):  argument
647     def redirect_internal(self, url, fp, errcode, errmsg, headers, data):  argument
671     def http_error_301(self, url, fp, errcode, errmsg, headers, data=None):  argument
675     def http_error_303(self, url, fp, errcode, errmsg, headers, data=None):  argument
679     def http_error_307(self, url, fp, errcode, errmsg, headers, data=None):  argument
686     def http_error_401(self, url, fp, errcode, errmsg, headers, data=None):  argument
708     def http_error_407(self, url, fp, errcode, errmsg, headers, data=None):  argument
730     def retry_proxy_http_basic_auth(self, url, realm, data=None):  argument
747     def retry_proxy_https_basic_auth(self, url, realm, data=None):  argument
764     def retry_http_basic_auth(self, url, realm, data=None):  argument
777     def retry_https_basic_auth(self, url, realm, data=None):  argument