[tests] use python3 for authproxy.py

Author: jnewbery

test/functional/test_framework/authproxy.py

@@ -33,20 +33,14 @@
 - uses standard Python json lib
 """
 
-try:
-    import http.client as httplib
-except ImportError:
-    import httplib
 import base64
 import decimal
+import http.client
 import json
 import logging
 import socket
 import time
-try:
-    import urllib.parse as urlparse
-except ImportError:
-    import urlparse
+import urllib.parse
 
 USER_AGENT = "AuthServiceProxy/0.1"
 
@@ -60,7 +54,7 @@ def __init__(self, rpc_error):
             errmsg = '%(message)s (%(code)i)' % rpc_error
         except (KeyError, TypeError):
             errmsg = ''
-        Exception.__init__(self, errmsg)
+        super().__init__(errmsg)
         self.error = rpc_error
 
 
@@ -77,7 +71,7 @@ def __init__(self, service_url, service_name=None, timeout=HTTP_TIMEOUT, connect
         self.__service_url = service_url
         self._service_name = service_name
         self.ensure_ascii = ensure_ascii # can be toggled on the fly by tests
-        self.__url = urlparse.urlparse(service_url)
+        self.__url = urllib.parse.urlparse(service_url)
         if self.__url.port is None:
             port = 80
         else:
@@ -98,10 +92,10 @@ def __init__(self, service_url, service_name=None, timeout=HTTP_TIMEOUT, connect
             # Callables re-use the connection of the original proxy
             self.__conn = connection
         elif self.__url.scheme == 'https':
-            self.__conn = httplib.HTTPSConnection(self.__url.hostname, port,
+            self.__conn = http.client.HTTPSConnection(self.__url.hostname, port,
                                                   timeout=timeout)
         else:
-            self.__conn = httplib.HTTPConnection(self.__url.hostname, port,
+            self.__conn = http.client.HTTPConnection(self.__url.hostname, port,
                                                  timeout=timeout)
 
     def __getattr__(self, name):
@@ -124,7 +118,7 @@ def _request(self, method, path, postdata):
         try:
             self.__conn.request(method, path, postdata, headers)
             return self._get_response()
-        except httplib.BadStatusLine as e:
+        except http.client.BadStatusLine as e:
             if e.line == "''": # if connection was closed, try again
                 self.__conn.close()
                 self.__conn.request(method, path, postdata, headers)