magic-removal: Upgraded django.dispatch to pydispatcher 1.0.3 (which hasn't been released yet; got it from latest CVS)

git-svn-id: http://code.djangoproject.com/svn/django/branches/magic-removal@2636 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/dispatch/dispatcher.py

@@ -25,12 +25,19 @@ Internal attributes:
 		deletion, (considerably speeds up the cleanup process
 		vs. the original code.)
 """
+from __future__ import generators
 import types, weakref
 from django.dispatch import saferef, robustapply, errors
 
 __author__ = "Patrick K. O'Brien <pobrien@orbtech.com>"
-__cvsid__ = "$Id: dispatcher.py,v 1.8 2004/11/26 06:37:33 mcfletch Exp $"
-__version__ = "$Revision: 1.8 $"[11:-2]
+__cvsid__ = "$Id: dispatcher.py,v 1.9 2005/09/17 04:55:57 mcfletch Exp $"
+__version__ = "$Revision: 1.9 $"[11:-2]
+
+try:
+	True
+except NameError:
+	True = 1==1
+	False = 1==0
 
 class _Parameter:
 	"""Used to represent default parameter values."""
@@ -366,6 +373,9 @@ def sendExact( signal=Any, sender=Anonymous, *arguments, **named ):
 
 def _removeReceiver(receiver):
 	"""Remove receiver from connections."""
+	if not sendersBack:
+		# During module cleanup the mapping will be replaced with None
+		return False
 	backKey = id(receiver)
 	for senderkey in sendersBack.get(backKey,()):
 		try:
@@ -417,8 +427,10 @@ def _removeSender(senderkey):
 		pass
 	# Senderkey will only be in senders dictionary if sender 
 	# could be weakly referenced.
-	try: del senders[senderkey]
-	except: pass
+	try: 
+		del senders[senderkey]
+	except: 
+		pass
 
 
 def _removeBackrefs( senderkey):

django/dispatch/robust.py

@@ -0,0 +1,57 @@
+"""Module implementing error-catching version of send (sendRobust)"""
+from django.dispatch.dispatcher import Any, Anonymous, liveReceivers, getAllReceivers
+from django.dispatch.robustapply import robustApply
+
+def sendRobust(
+	signal=Any, 
+	sender=Anonymous, 
+	*arguments, **named
+):
+	"""Send signal from sender to all connected receivers catching errors
+	
+	signal -- (hashable) signal value, see connect for details
+
+	sender -- the sender of the signal
+	
+		if Any, only receivers registered for Any will receive
+		the message.
+
+		if Anonymous, only receivers registered to receive
+		messages from Anonymous or Any will receive the message
+
+		Otherwise can be any python object (normally one
+		registered with a connect if you actually want
+		something to occur).
+
+	arguments -- positional arguments which will be passed to
+		*all* receivers. Note that this may raise TypeErrors
+		if the receivers do not allow the particular arguments.
+		Note also that arguments are applied before named
+		arguments, so they should be used with care.
+
+	named -- named arguments which will be filtered according
+		to the parameters of the receivers to only provide those
+		acceptable to the receiver.
+
+	Return a list of tuple pairs [(receiver, response), ... ]
+
+	if any receiver raises an error (specifically any subclass of Exception),
+	the error instance is returned as the result for that receiver.
+	"""
+	# Call each receiver with whatever arguments it can accept.
+	# Return a list of tuple pairs [(receiver, response), ... ].
+	responses = []
+	for receiver in liveReceivers(getAllReceivers(sender, signal)):
+		try:
+			response = robustApply(
+				receiver,
+				signal=signal,
+				sender=sender,
+				*arguments,
+				**named
+			)
+		except Exception, err:
+			responses.append((receiver, err))
+		else:
+			responses.append((receiver, response))
+	return responses

django/dispatch/saferef.py

@@ -109,12 +109,19 @@ class BoundMethodWeakref(object):
 				try:
 					if callable( function ):
 						function( self )
-				except Exception:
+				except Exception, e:
+					try:
 						traceback.print_exc()
+					except AttributeError, err:
+						print '''Exception during saferef %s cleanup function %s: %s'''%(
+							self, function, e
+						)
 		self.deletionMethods = [onDelete]
 		self.key = self.calculateKey( target )
 		self.weakSelf = weakref.ref(target.im_self, remove)
 		self.weakFunc = weakref.ref(target.im_func, remove)
+		self.selfName = str(target.im_self)
+		self.funcName = str(target.im_func.__name__)
 	def calculateKey( cls, target ):
 		"""Calculate the reference key for this reference
 
@@ -127,8 +134,8 @@ class BoundMethodWeakref(object):
 		"""Give a friendly representation of the object"""
 		return """%s( %s.%s )"""%(
 			self.__class__.__name__,
-			self.weakSelf(),
-			self.weakFunc().__name__,
+			self.selfName,
+			self.funcName,
 		)
 	__repr__ = __str__
 	def __nonzero__( self ):