### 導航 - [索引](../genindex.xhtml "總目錄") - [模塊](../py-modindex.xhtml "Python 模塊索引") | - [下一頁](fcntl.xhtml "fcntl --- The fcntl and ioctl system calls") | - [上一頁](tty.xhtml "tty --- 終端控制功能") | -  - [Python](https://www.python.org/) ? - zh\_CN 3.7.3 [文檔](../index.xhtml) ? - [Python 標準庫](index.xhtml) ? - [Unix 專有服務](unix.xhtml) ? - $('.inline-search').show(0); | # [`pty`](#module-pty "pty: Pseudo-Terminal Handling for Linux. (Linux)") --- Pseudo-terminal utilities **Source code:** [Lib/pty.py](https://github.com/python/cpython/tree/3.7/Lib/pty.py) \[https://github.com/python/cpython/tree/3.7/Lib/pty.py\] - - - - - - The [`pty`](#module-pty "pty: Pseudo-Terminal Handling for Linux. (Linux)") module defines operations for handling the pseudo-terminal concept: starting another process and being able to write to and read from its controlling terminal programmatically. Because pseudo-terminal handling is highly platform dependent, there is code to do it only for Linux. (The Linux code is supposed to work on other platforms, but hasn't been tested yet.) The [`pty`](#module-pty "pty: Pseudo-Terminal Handling for Linux. (Linux)") module defines the following functions: `pty.``fork`()Fork. Connect the child's controlling terminal to a pseudo-terminal. Return value is `(pid, fd)`. Note that the child gets *pid* 0, and the *fd* is *invalid*. The parent's return value is the *pid* of the child, and *fd* is a file descriptor connected to the child's controlling terminal (and also to the child's standard input and output). `pty.``openpty`()Open a new pseudo-terminal pair, using [`os.openpty()`](os.xhtml#os.openpty "os.openpty") if possible, or emulation code for generic Unix systems. Return a pair of file descriptors `(master, slave)`, for the master and the slave end, respectively. `pty.``spawn`(*argv*\[, *master\_read*\[, *stdin\_read*\]\])Spawn a process, and connect its controlling terminal with the current process's standard io. This is often used to baffle programs which insist on reading from the controlling terminal. The functions *master\_read* and *stdin\_read* should be functions which read from a file descriptor. The defaults try to read 1024 bytes each time they are called. 在 3.4 版更改: [`spawn()`](#pty.spawn "pty.spawn") now returns the status value from [`os.waitpid()`](os.xhtml#os.waitpid "os.waitpid")on the child process. ## 示例 The following program acts like the Unix command *script(1)*, using a pseudo-terminal to record all input and output of a terminal session in a "typescript". ``` import argparse import os import pty import sys import time parser = argparse.ArgumentParser() parser.add_argument('-a', dest='append', action='store_true') parser.add_argument('-p', dest='use_python', action='store_true') parser.add_argument('filename', nargs='?', default='typescript') options = parser.parse_args() shell = sys.executable if options.use_python else os.environ.get('SHELL', 'sh') filename = options.filename mode = 'ab' if options.append else 'wb' with open(filename, mode) as script: def read(fd): data = os.read(fd, 1024) script.write(data) return data print('Script started, file is', filename) script.write(('Script started on %s\n' % time.asctime()).encode()) pty.spawn(shell, read) script.write(('Script done on %s\n' % time.asctime()).encode()) print('Script done, file is', filename) ``` ### 導航 - [索引](../genindex.xhtml "總目錄") - [模塊](../py-modindex.xhtml "Python 模塊索引") | - [下一頁](fcntl.xhtml "fcntl --- The fcntl and ioctl system calls") | - [上一頁](tty.xhtml "tty --- 終端控制功能") | -  - [Python](https://www.python.org/) ? - zh\_CN 3.7.3 [文檔](../index.xhtml) ? - [Python 標準庫](index.xhtml) ? - [Unix 專有服務](unix.xhtml) ? - $('.inline-search').show(0); | ? [版權所有](../copyright.xhtml) 2001-2019, Python Software Foundation. Python 軟件基金會是一個非盈利組織。 [請捐助。](https://www.python.org/psf/donations/) 最后更新于 5月 21, 2019. [發現了問題](../bugs.xhtml)？ 使用[Sphinx](http://sphinx.pocoo.org/)1.8.4 創建。