Define % operator similar to int%int.

of a compiler warning.

Accept * as well as + in varargs arg list.

GNU regular expressions

Change / and % to match divmod.

Remove some functions that need not be exported.

Save argv[0] in global argv0.

the local trace function.

Added pdd (post-mortem debugging) method to class Pdb.

Moved class Cmd out to module cmd.py.
Rewrote implementation of stack trace to incorporate traceback objects.