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# Python2.x Python os.isatty() Method [ Python OS File/Directory Methods](#) * * * ### Overview The os.isatty() method is used to determine if the file descriptor fd is open and connected to a tty(-like) device, returning True if so, otherwise False. ### Syntax The syntax format of the **isatty()** method is as follows: os.isatty() ### Parameters * None ### Return Value Returns True if the file descriptor fd is open and connected to a tty(-like) device, otherwise False. ### Example The following example demonstrates the use of the isatty() method: #!/usr/bin/python# -*- coding: UTF-8 -*-import os, sys # Open file fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT )# Write string os.write(fd, "This is test")# Use