support for extension types, not classes.
pickle(): If the type is a class or if the reduction function is not
callable, raise a TypeError.
constructor(): If the constructor is not callable, raise TypeError.
This (partially) closes SourceForge patch #101859.
1. Comments at the beginning of the module, before
functions, and before classes have been turned
into docstrings.
2. Tabs are normalized to four spaces.
Also, removed the "remove" function from dircmp.py, which reimplements
list.remove() (it must have been very old).
Fred Drake
Guido van Rossum