Here are few patches and new modules for python library v1.5,
mostly for DOS.

   New module dospopen.py implements popen() for DOS (actually there are
low-level objects in the module, and popen() defined in os.py; new os.py
and diffs are there too).
   To implement this module I need user-defined file wrapper (similar to
UserList and UserDict). I found it in rexec.py.
   Also I changed tempfile.py - changed template for temporary files to
widely used (in DOS) format - char '~', then 2-3 chars file extension, then
random part. I use "~pyXXXX" template.

   dospopen.py - popen() for DOS

   os.py - include test for popen() and definition for popen for DOS

   tempfile.py - patched tempfile