Move imports to top

is not already present.  If it is, raise an exception, since that should not
happen in a well-defined conversion.

whrandom module.  (The deprecation was effective in Python 2.1.)

used to define Python objects.

Fix a typo in the comments for csimplemacrodesc.

This suppresses bogus warnings about modules installed into a directory
not in sys.path.

Bugfix candidate.

Fixes bug #525620.

This addresses the issue in SF bug #515745.

open_the_file:  Some (not all) flavors of Windows set errno to EINVAL
when passed a syntactically invalid filename.  Python turned that into an
incomprehensible complaint about the mode string.  Fixed by special-casing
MSVC.

  when PyType_Ready() was called, if ob_type was found to be NULL, it
  was always set to &PyType_Type; now it is set to base->ob_type,
  where base is tp_base, defaulting to &PyObject_Type.

- PyType_Ready() accidentally did not inherit tp_is_gc; now it does.

Bugfix candidate.

I probably didn't do a correct thing for the LaTeX spelling of the
integer 1.

Add standard header preamble and footer, a-la intobject.h.  Main purpose is extern "C" for C++ programs.

the big numbers.

  method returns something that's not a C instance, its __init__ is
  not called.  [SF bug #537450]