OS module in Python provides functions for interacting with the operating system. OS comes under Python’s standard utility modules. This module provides a portable way of using operating system dependent functionality.
os.write() method in Python is used to write a bytestring to the given file descriptor.
A file descriptor is small integer value that corresponds to a file that has been opened by the current process. It is used to perform various lower level I/O operations like read, write, send etc.
Note: os.write() method is intended for low-level operation and should be applied to a file descriptor as returned by os.open() or os.pipe() method.
Syntax: os.write(fd, str)
Parameter:
fd: The file descriptor representing the target file.
str: A bytes-like object to be written in the file.Return Type: This method returns an integer value which represents the number of bytes actually written.
# Python program to explain os.write() method # importing os module import os # File path path = "/home / ihritik / Documents / GeeksForGeeks.txt" # Open the file and get # the file descriptor associated # with it using os.open() method fd = os.open(path, os.O_RDWR) # String to be written s = "GeeksForGeeks: A Computer science portal for Geeks." # Convert the string to bytes line = str.encode(s) # Write the bytestring to the file # associated with the file # descriptor fd and get the number of # Bytes actually written numBytes = os.write(fd, line) print("Number of bytes written:", numBytes) # close the file descriptor os.close(fd) |
Number of bytes written: 51
