
"getpass" --- Portable password input
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The "getpass" module provides two functions:

getpass.getpass([prompt[, stream]])

   Prompt the user for a password without echoing.  The user is
   prompted using the string *prompt*, which defaults to "'Password:
   '". On Unix, the prompt is written to the file-like object
   *stream*.  *stream* defaults to the controlling terminal (/dev/tty)
   or if that is unavailable to "sys.stderr" (this argument is ignored
   on Windows).

   If echo free input is unavailable getpass() falls back to printing
   a warning message to *stream* and reading from "sys.stdin" and
   issuing a "GetPassWarning".

   Availability: Macintosh, Unix, Windows.

   Changed in version 2.5: The *stream* parameter was added.

   Changed in version 2.6: On Unix it defaults to using /dev/tty
   before falling back to "sys.stdin" and "sys.stderr".

   Note: If you call getpass from within IDLE, the input may be done
     in the terminal you launched IDLE from rather than the idle
     window itself.

exception exception getpass.GetPassWarning

   A "UserWarning" subclass issued when password input may be echoed.

getpass.getuser()

   Return the "login name" of the user. Availability: Unix, Windows.

   This function checks the environment variables "LOGNAME", "USER",
   "LNAME" and "USERNAME", in order, and returns the value of the
   first one which is set to a non-empty string.  If none are set, the
   login name from the password database is returned on systems which
   support the "pwd" module, otherwise, an exception is raised.
