Apply SF patch #101029: call __getitem__ with a proper slice object if there

is no __getslice__ available. Also does the same for C extension types.
Includes rudimentary documentation (it could use a cross reference to the
section on slice objects, I couldn't figure out how to do that) and a test
suite for all Python __hooks__ I could think of, including the new
behaviour.

Lib/test/test_class.py

@@ -0,0 +1,219 @@
+"Test the functionality of Python classes implementing operators."
+
+
+testmeths = [
+
+# Binary operations
+    "add",
+    "radd",
+    "sub",
+    "rsub",
+    "mul",
+    "rmul",
+    "div",
+    "rdiv",
+    "mod",
+    "rmod",
+    "divmod",
+    "rdivmod",
+    "pow",
+    "rpow",
+    "rshift",
+    "rrshift",
+    "lshift",
+    "rlshift",
+    "and",
+    "rand",
+    "or",
+    "ror",
+    "xor",
+    "rxor",
+
+# List/dict operations
+    "contains",
+    "getitem",
+    "getslice",
+    "setitem",
+    "setslice",
+    "delitem",
+    "delslice",
+
+# Unary operations
+    "neg",
+    "pos",
+    "abs",
+    "int",
+    "long",
+    "float",
+    "oct",
+    "hex",
+
+# generic operations
+    "init",
+    "del",
+    ]
+
+# These need to return something other than None
+#    "coerce",
+#    "hash",
+#    "str",
+#    "repr",
+
+# These are separate because they can influence the test of other methods.
+#    "getattr",
+#    "setattr",
+#    "delattr",
+
+class AllTests:
+    def __coerce__(self, *args):
+        print "__coerce__:", args
+        return (self,) + args 
+
+    def __hash__(self, *args):
+        print "__hash__:", args
+        return id(self)
+
+    def __str__(self, *args):
+        print "__str__:", args
+        return "AllTests"
+
+    def __repr__(self, *args):
+        print "__repr__:", args
+        return "AllTests"
+
+    def __cmp__(self, *args):
+        print "__cmp__:", args
+        return 0
+
+for method in testmeths:
+    exec("""def __%(method)s__(self, *args):
+                print "__%(method)s__:", args
+"""%locals(), AllTests.__dict__);
+
+# this also tests __init__ of course.
+testme = AllTests()
+
+# Binary operations
+
+testme + 1
+1 + testme
+
+testme - 1
+1 - testme
+
+testme * 1
+1 * testme
+
+testme / 1
+1 / testme
+
+testme % 1
+1 % testme
+
+divmod(testme,1)
+divmod(1, testme)
+
+testme ** 1
+1 ** testme
+
+testme >> 1
+1 >> testme
+
+testme << 1
+1 << testme
+
+testme & 1
+1 & testme
+
+testme | 1
+1 | testme
+
+testme ^ 1
+1 ^ testme
+
+
+# List/dict operations
+
+1 in testme
+
+testme[1]
+testme[1] = 1
+del testme[1]
+
+testme[:42]
+testme[:42] = "The Answer"
+del testme[:42]
+
+testme[2:1024:10]
+testme[2:1024:10] = "A lot"
+del testme[2:1024:10]
+
+testme[:42, ..., :24:, 24, 100]
+testme[:42, ..., :24:, 24, 100] = "Strange"
+del testme[:42, ..., :24:, 24, 100]
+
+
+# Now remove the slice hooks to see if converting normal slices to slice
+# object works.
+
+del AllTests.__getslice__
+del AllTests.__setslice__
+del AllTests.__delslice__
+
+testme[:42]
+testme[:42] = "The Answer"
+del testme[:42]
+
+
+# Unary operations
+
+-testme
++testme
+abs(testme)
+int(testme)
+long(testme)
+float(testme)
+oct(testme)
+hex(testme)
+
+
+# And the rest...
+
+hash(testme)
+repr(testme)
+str(testme)
+
+testme == 1
+testme < 1
+testme > 1
+testme <> 1
+testme != 1
+1 == testme
+1 < testme
+1 > testme
+1 <> testme
+1 != testme
+
+# This test has to be last (duh.)
+
+del testme
+
+
+# Interfering tests
+
+class ExtraTests:
+	def __getattr__(self, *args):
+		print "__getattr__:", args
+		return "SomeVal"
+
+	def __setattr__(self, *args):
+		print "__setattr__:", args
+
+	def __delattr__(self, *args):
+		print "__delattr__:", args
+
+testme = ExtraTests()
+testme.spam
+testme.eggs = "spam, spam, spam and ham"
+del testme.cardinal
+