Committing PEP 232, function attribute feature, approved by Guido.

Closes SF patch #103123.

Regression test for function attributes, with output file.

Lib/test/output/test_funcattrs

@@ -0,0 +1 @@
+test_funcattrs

Lib/test/test_funcattrs.py

@@ -0,0 +1,102 @@
+from test_support import verbose, TestFailed
+
+class F:
+    def a(self):
+        pass
+
+def b():
+    'my docstring'
+    pass
+
+# setting attributes on functions
+try:
+    b.publish
+except AttributeError:
+    pass
+else:
+    raise TestFailed, 'expected AttributeError'
+
+b.publish = 1
+if b.publish <> 1:
+    raise TestFailed, 'function attribute not set to expected value'
+
+docstring = 'its docstring'
+b.__doc__ = docstring
+if b.__doc__ <> docstring:
+    raise TestFailed, 'problem with setting __doc__ attribute'
+
+if 'publish' not in dir(b):
+    raise TestFailed, 'attribute not in dir()'
+
+f1 = F()
+f2 = F()
+
+try:
+    F.a.publish
+except AttributeError:
+    pass
+else:
+    raise TestFailed, 'expected AttributeError'
+
+try:
+    f1.a.publish
+except AttributeError:
+    pass
+else:
+    raise TestFailed, 'expected AttributeError'
+
+
+F.a.publish = 1
+if F.a.publish <> 1:
+    raise TestFailed, 'unbound method attribute not set to expected value'
+
+if f1.a.publish <> 1:
+    raise TestFailed, 'bound method attribute access did not work'
+
+if f2.a.publish <> 1:
+    raise TestFailed, 'bound method attribute access did not work'
+
+if 'publish' not in dir(F.a):
+    raise TestFailed, 'attribute not in dir()'
+
+try:
+    f1.a.publish = 0
+except TypeError:
+    pass
+else:
+    raise TestFailed, 'expected TypeError'
+
+F.a.myclass = F
+f1.a.myclass
+f2.a.myclass
+f1.a.myclass
+F.a.myclass
+
+if f1.a.myclass is not f2.a.myclass or \
+   f1.a.myclass is not F.a.myclass:
+    raise TestFailed, 'attributes were not the same'
+
+# try setting __dict__
+try:
+    F.a.__dict__ = (1, 2, 3)
+except TypeError:
+    pass
+else:
+    raise TestFailed, 'expected TypeError'
+
+F.a.__dict__ = {'one': 11, 'two': 22, 'three': 33}
+if f1.a.two <> 22:
+    raise TestFailed, 'setting __dict__'
+
+from UserDict import UserDict
+d = UserDict({'four': 44, 'five': 55})
+
+try:
+    F.a.__dict__ = d
+except TypeError:
+    pass
+else:
+    raise TestFailed
+
+if f2.a.one <> f1.a.one <> F.a.one <> 11:
+    raise TestFailed