# `getpass` — Portable password input

Source code: Lib/getpass.py

Доступность: not WASI.

This module does not work or is not available on WebAssembly. See WebAssembly platforms for more information.

The `getpass` module provides two functions:

getpass.getpass(prompt='Password: ', stream=None, *, echo_char=None)

  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 using the replace error handler if needed. stream defaults to the controlling terminal (`/dev/tty`) or if that is unavailable to `sys.stderr` (this argument is ignored on Windows).

  The echo_char argument controls how user input is displayed while typing. If echo_char is `None` (default), input remains hidden. Otherwise, echo_char must be a single printable ASCII character and each typed character is replaced by it. For example, `echo_char='*'` will display asterisks instead of the actual input.

  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`.

  Примечание

  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.

  Примечание

  On Unix systems, when echo_char is set, the terminal will be configured to operate in noncanonical mode. Common terminal control characters are supported:

  - `Ctrl`+`A` - Move cursor to beginning of line

  - `Ctrl`+`E` - Move cursor to end of line

  - `Ctrl`+`K` - Kill (delete) from cursor to end of line

  - `Ctrl`+`U` - Kill (delete) entire line

  - `Ctrl`+`W` - Erase previous word

  - `Ctrl`+`V` - Insert next character literally (quote)

  - `Backspace`/`DEL` - Delete character before cursor

  These shortcuts work by reading the terminal’s configured control character mappings from termios settings.

  Изменено в версии 3.14: Added the echo_char parameter for keyboard feedback.

  Изменено в версии 3.15: When using non-empty echo_char on Unix, keyboard shortcuts (including cursor movement and line editing) are now properly handled using the terminal’s control character configuration.

exception getpass.GetPassWarning

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

getpass.getuser()

  Return the «login name» of the user.

  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 `OSError` is raised.

  In general, this function should be preferred over `os.getlogin()`.

  Изменено в версии 3.13: Previously, various exceptions beyond just `OSError` were raised.