Issue #20558: Improved implementation of error handling.

Lib/logging/config.py

@@ -24,8 +24,18 @@ Copyright (C) 2001-2014 Vinay Sajip. All Rights Reserved.
 To use, simply 'import logging' and log away!
 """
 
-import sys, logging, logging.handlers, socket, struct, os, traceback, re
-import types, cStringIO
+import cStringIO
+import errno
+import io
+import logging
+import logging.handlers
+import os
+import re
+import socket
+import struct
+import sys
+import traceback
+import types
 
 try:
     import thread
@@ -38,10 +48,7 @@ from SocketServer import ThreadingTCPServer, StreamRequestHandler
 
 DEFAULT_LOGGING_CONFIG_PORT = 9030
 
-if sys.platform == "win32":
-    RESET_ERROR = 10054   #WSAECONNRESET
-else:
-    RESET_ERROR = 104     #ECONNRESET
+RESET_ERROR = errno.ECONNRESET
 
 #
 #   The following code implements a socket listener for on-the-fly
@@ -510,21 +517,21 @@ class DictConfigurator(BaseConfigurator):
                             level = handler_config.get('level', None)
                             if level:
                                 handler.setLevel(logging._checkLevel(level))
-                        except StandardError, e:
+                        except StandardError as e:
                             raise ValueError('Unable to configure handler '
                                              '%r: %s' % (name, e))
                 loggers = config.get('loggers', EMPTY_DICT)
                 for name in loggers:
                     try:
                         self.configure_logger(name, loggers[name], True)
-                    except StandardError, e:
+                    except StandardError as e:
                         raise ValueError('Unable to configure logger '
                                          '%r: %s' % (name, e))
                 root = config.get('root', None)
                 if root:
                     try:
                         self.configure_root(root, True)
-                    except StandardError, e:
+                    except StandardError as e:
                         raise ValueError('Unable to configure root '
                                          'logger: %s' % e)
             else:
@@ -539,7 +546,7 @@ class DictConfigurator(BaseConfigurator):
                     try:
                         formatters[name] = self.configure_formatter(
                                                             formatters[name])
-                    except StandardError, e:
+                    except StandardError as e:
                         raise ValueError('Unable to configure '
                                          'formatter %r: %s' % (name, e))
                 # Next, do filters - they don't refer to anything else, either
@@ -547,7 +554,7 @@ class DictConfigurator(BaseConfigurator):
                 for name in filters:
                     try:
                         filters[name] = self.configure_filter(filters[name])
-                    except StandardError, e:
+                    except StandardError as e:
                         raise ValueError('Unable to configure '
                                          'filter %r: %s' % (name, e))
 
@@ -561,7 +568,7 @@ class DictConfigurator(BaseConfigurator):
                         handler = self.configure_handler(handlers[name])
                         handler.name = name
                         handlers[name] = handler
-                    except StandardError, e:
+                    except StandardError as e:
                         if 'target not configured yet' in str(e):
                             deferred.append(name)
                         else:
@@ -574,7 +581,7 @@ class DictConfigurator(BaseConfigurator):
                         handler = self.configure_handler(handlers[name])
                         handler.name = name
                         handlers[name] = handler
-                    except StandardError, e:
+                    except StandardError as e:
                         raise ValueError('Unable to configure handler '
                                          '%r: %s' % (name, e))
 
@@ -615,7 +622,7 @@ class DictConfigurator(BaseConfigurator):
                         existing.remove(name)
                     try:
                         self.configure_logger(name, loggers[name])
-                    except StandardError, e:
+                    except StandardError as e:
                         raise ValueError('Unable to configure logger '
                                          '%r: %s' % (name, e))
 
@@ -638,7 +645,7 @@ class DictConfigurator(BaseConfigurator):
                 if root:
                     try:
                         self.configure_root(root)
-                    except StandardError, e:
+                    except StandardError as e:
                         raise ValueError('Unable to configure root '
                                          'logger: %s' % e)
         finally:
@@ -650,7 +657,7 @@ class DictConfigurator(BaseConfigurator):
             factory = config['()'] # for use in exception handler
             try:
                 result = self.configure_custom(config)
-            except TypeError, te:
+            except TypeError as te:
                 if "'format'" not in str(te):
                     raise
                 #Name of parameter changed from fmt to format.
@@ -680,7 +687,7 @@ class DictConfigurator(BaseConfigurator):
         for f in filters:
             try:
                 filterer.addFilter(self.config['filters'][f])
-            except StandardError, e:
+            except StandardError as e:
                 raise ValueError('Unable to add filter %r: %s' % (f, e))
 
     def configure_handler(self, config):
@@ -689,7 +696,7 @@ class DictConfigurator(BaseConfigurator):
         if formatter:
             try:
                 formatter = self.config['formatters'][formatter]
-            except StandardError, e:
+            except StandardError as e:
                 raise ValueError('Unable to set formatter '
                                  '%r: %s' % (formatter, e))
         level = config.pop('level', None)
@@ -711,7 +718,7 @@ class DictConfigurator(BaseConfigurator):
                         config['class'] = cname # restore for deferred configuration
                         raise StandardError('target not configured yet')
                     config['target'] = th
-                except StandardError, e:
+                except StandardError as e:
                     raise ValueError('Unable to set target handler '
                                      '%r: %s' % (config['target'], e))
             elif issubclass(klass, logging.handlers.SMTPHandler) and\
@@ -724,7 +731,7 @@ class DictConfigurator(BaseConfigurator):
         kwargs = dict([(k, config[k]) for k in config if valid_ident(k)])
         try:
             result = factory(**kwargs)
-        except TypeError, te:
+        except TypeError as te:
             if "'stream'" not in str(te):
                 raise
             #The argument name changed from strm to stream
@@ -746,7 +753,7 @@ class DictConfigurator(BaseConfigurator):
         for h in handlers:
             try:
                 logger.addHandler(self.config['handlers'][h])
-            except StandardError, e:
+            except StandardError as e:
                 raise ValueError('Unable to add handler %r: %s' % (h, e))
 
     def common_logger_config(self, logger, config, incremental=False):
@@ -841,13 +848,9 @@ def listen(port=DEFAULT_LOGGING_CONFIG_PORT):
                             traceback.print_exc()
                     if self.server.ready:
                         self.server.ready.set()
-            except socket.error, e:
-                if not isinstance(e.args, tuple):
+            except socket.error as e:
+                if e.errno != RESET_ERROR:
                     raise
-                else:
-                    errcode = e.args[0]
-                    if errcode != RESET_ERROR:
-                        raise
 
     class ConfigSocketReceiver(ThreadingTCPServer):
         """