Python Os.write() Method

Description

Python method write() writes the string str to file descriptor fd. Return the number of bytes actually written.

syntax

Following is the syntax for write() method :

os.write(top[, topdown=True[, onerror=None[, followlinks=False]]])

Parameters

• fd − This is the file descriptor.
• str − This is the string to be written.

Return Value

This method returns the number of bytes actually written.

Example

Python following example shows the usage of write() method.

# !/usr/bin/python

import os, sys

# Open file
fd = os.open("f1.txt",os.O_RDWR'os.CREAT)

# Writing text
ret = os.write(fd,"This is test")

# ret consists of number of bytes written to f1.txt
print "the number of bytes written: "
print  ret

print "written successfully"

# Close opened file
os.close(fd)
print "Closed the file successfully!!"

When we run the above program, it produces the following result:

the number of bytes written:
12
written successfully 
Closed the file successfully!!

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