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os.closerange(fd_low, fd_high);

for fd in range(fd_low, fd_high):
    try:
        os.close(fd)
    except OSError:
        pass

#!/usr/bin/python3

import os, sys

# Open a file
fd = os.open("foo.txt", os.O_RDWR|os.O_CREAT)

# Write a string
os.write(fd, "This is a test")

# Close the file
os.closerange(fd, fd)

print("Successfully closed the file!!")

Successfully closed the file!!