Generic OS Services os — Miscellaneous operating system interfaces io — Core tools for working with streams time — Time access and conversions argparse — Parser for command-line options, arguments and sub-commands getopt — C-style parser for command line options logging — Logging facility for Python logging.config — Logging configuration logging.handlers — Logging handlers getpass — Portable password input curses — Terminal handling for character-cell displays curses.textpad — Text input widget for curses programs curses.ascii — Utilities for ASCII characters curses.panel — A panel stack extension for curses platform — Access to underlying platform’s identifying data errno — Standard errno system symbols ctypes — A foreign function library for Python