• You have to remember that AS/400 is an ebcdic machine.
  That is why ' ' == chr(64), and not chr(32), and '\n' == '\045', and not '\012'.
  This is not a big issue as long as you know it.
  This is also why some of the test cases fails.
   
• When you use modules that expects ascii data (binascii, base64 ...),
  you must remember to encode your data to ascii. (s.encode('ascii'))
   
• Unicode search in sre module is broken.
• Pyc files can not be shared with an ASCII computer.
• There are problems with some packages, the email package is one of them.

Source:

• Source files special for the AS/400 are here.(you don't need this) source.zip
  

Changes:

2003-09-27   Python2.3.1
2003-08-01   Python2.3
2003-05-18   Bug fix in db2 and os400 module
2002-11-09   Python2.2.2. db2 module.
2002-04-23   Python2.2.1
2001-12-26   Python2.2
2001-11-09   A few bugs fixed. Changes in File400 and os400, new modules.
2001-05-14   Python2.1, some bugs fixed.
2001-04-09   Bugs in some modules fixed (binascii, binhex, base64, zipfile).
                      Added dynamic loading.
2001-03-28   Some bug fixes.
2001-03-05   Some bug fixes.
2001-02-15   New module os400. (data area and program call)
2001-02-15   Some File400 bug fixes and changes.
2001-02-09   os.system() no longer spawns a new process, use spawn for that.
2001-02-09   File400 takes keywords, new keyword qry (a wrapper for opnqryf).
2001-02-07   Fixed ccsid problem and some bugs in File400.
2001-02-04   Added File400 class.
2001-01-29   More bugs fixed.
2001-01-26   Repr fixed.
2001-01-26   Unicode fixed.