# import os Library  

import os 

# open file

fd = os.open( "file.txt", os.O_RDWR|os.O_CREAT ) 

# Print value of file descriptor 

print("Original file descriptor:", fd) 

# Duplicate file descriptor 

dup_fd = 9

os.dup2(fd, dup_fd) 

# Print value of duplicate file descriptor 

print("Duplicated file descriptor:", dup_fd) 

# Close file descriptors 

os.close(fd) 

os.close(dup_fd)

​