Python| os.isatty() 方法
Python中的OS 模块提供了与操作系统交互的功能。操作系统属于 Python 的标准实用程序模块。该模块提供了一种使用操作系统相关功能的可移植方式。
Python中的os.isatty()
方法用于检查指定的文件描述符是否打开并连接到 tty(-like) 设备。 “tty”最初的意思是“电传打字机”,而 tty(-like) 设备是任何充当电传打字机的设备,即终端。
文件描述符是对应于文件或其他输入/输出资源(例如管道或网络套接字)的小整数值。它是资源的抽象指标,并充当句柄来执行各种较低级别的 I/O 操作,如读、写、发送等。
Syntax: os.isatty(fd)
Parameter:
fd: A file descriptor, whose is to be checked.
Return Type: This method returns a Boolean value of class bool. Returns True if the specified file descriptor is open and connected to a tty(-like) device otherwise, returns False.
代码:使用 os.isatty() 方法检查给定的文件描述符是否打开并连接到 tty(-like) 设备
# Python program to explain os.isatty() method
# importing os module
import os
# Create a pipe using os.pipe() method
# It will return a pair of
# file descriptors (r, w) usable for
# reading and writing, respectively.
r, w = os.pipe()
# Check if file descriptor r
# is open and connected
# to a tty(-like) device
# using os.isatty() method
print("Connected to a terminal:", os.isatty(r))
# Open a new pseudo-terminal pair
# using os.openpty() method
# It will return master and slave
# file descriptor for
# pty ( pseudo terminal device) and
# tty ( native terminal device) respectively
master, slave = os.openpty()
# Check if file descriptor master
# is open and connected
# to a tty(-like) device
# using os.isatty() method
print("Connected to a terminal:", os.isatty(master))
输出:
Connected to a terminal: False
Connected to a terminal: True