# A.2 Miscellaneous useful utilities

Some of these are very old and/or not very robust; marked with ``hmm.''

`bdb`
  -- A generic Python debugger base class (used by pdb).

`ihooks`
  -- Import hook support (for `rexec`; may become obsolete).

`platform`
  -- This module tries to retrieve as much platform identifying data as possible. It makes this information available via function APIs. If called from the command line, it prints the platform information concatenated as single string to `sys.stdout`. The output format is useable as part of a filename. New in version 2.3.

`smtpd`
  -- An SMTP daemon implementation which meets the minimum requirements for RFC 821 conformance.