Python | os.open() method
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.open() method in Python is used to open a specified file path and set various flags according to the specified flags and its mode according to specified mode.
This method returns a file descriptor for newly open file. The returned file descriptor is non-inheritable.
Syntax: os.open(path, flags, mode = 0o777, *, dir_fd = None)
Parameters:
Path: A path-like object representing the file system path. This is the file path to be opened.
A path-like object is a string or bytes object which represents a path.
flags: This parameter specify the flags to be set for newly opened file.
mode (optional): A numeric value representing the mode of the newly opened file. The default value of this parameter is 0o777 (octal).
dir_fd (optional): A file descriptor referring to a directory.Return Type: This method returns a file descriptor for newly opened file.
os.open() method to open a file path# Python program to explain os.open() method # importing os module import os # File path to be openedpath = './file9.txt' # Mode to be set mode = 0o666 # flagsflags = os.O_RDWR | os.O_CREAT # Open the specified file path# using os.open() method# and get the file descriptor for # opened file pathfd = os.open(path, flags, mode) print("File path opened successfully.") # Write a string to the file# using file descriptorstr = "GeeksforGeeks: A computer science portal for geeks."os.write(fd, str.encode())print("String written to the file descriptor.") # Now read the file # from beginningos.lseek(fd, 0, 0)str = os.read(fd, os.path.getsize(fd))print("\nString read from the file descriptor:")print(str.decode()) # Close the file descriptoros.close(fd)print("\nFile descriptor closed successfully.") |
File path opened successfully. String written to the file descriptor. String read from file descriptor: GeeksforGeeks: A computer science portal for geeks. File descriptor closed successfully.
Reference: https://docs.python.org/3/library/os.html#os.open
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