Python os closerange() Method with example

Hello dear readers! Welcome back to another section of our tutorial on Python. In this tutorial guide, we are going to be studying about the Os closerange() method.

os closerange() method closes all file descriptor from the fd_low to fd_high, ignoring any errors. This method was introduced to users in Python version 2.6.

Syntax

Below is the syntax for Python Os closerange() method -

os.closerange(fd_low,  fd_high);

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Parameter Details

• fd_low - The lowest file descriptor to be closed.

• fd_high - The highest file descriptor to be closed.

This function is equivalent to -

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

Return Value

It does not return any value.

Example

The following below is a simple example -

#!/usr/bin/python

import os, sys

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

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

# Close a single opened file
os.closerange( fd, fd)

print "Closed all the files successfully!!"

Output

When the above code is executed, it will produce the following result -

Closed all the files successfully!!

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Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial, we are going to be studying about the Python OS dup() Method.

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