dup() method belongs to the
os module. The
os module contains implementations for various functions to communicate and work with the operating system. The
dup() method returns a duplicate for a file descriptor.
Syntax of Python
||integer||A file descriptor associated with a valid resource.|
dup() method returns a duplicate for a file descriptor. Note that the new file descriptor is non-inheritable. Non-inheritable means that the file descriptor created can not be inherited by the child processes. In child processes, all the non-inheritable file descriptors are closed.
Example Code: Use the
os.dup() Method to Duplicate a File Descriptor
import os path = "a.txt" f1 = os.open(path, os.O_RDONLY) fcopy = os.dup(f1) print(f1) print(fcopy) os.close(f1)
As we can conclude from the output, the two file descriptors are different, and the
dup() method created a hard copy of the original file descriptor.