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.getrandom() method is used to generate a string of size random bytes suitable for cryptographic use or we can say this method generates a string containing random characters. It can also be used to seed user-space random number generators. It can return less bytes than requested.
Syntax: os.getrandom(size, flag)
Parameter:
size: It is the size of string random bytes
flag: It is a bit mask that can contain zero or more flags ORed together. Flags are os.GRND_RANDOM and GRND_NONBLOCK.Return Value: This method returns a string which represents random bytes suitable for cryptographic use.
Flags –
os.GRND_NONBLOCK: If this flag is set then getrandom() does not block but instead immediately raises BlockingIOError if no random bytes are available to read.
os.GRND_RANDOM: If this bit is set then random bytes are drawn from the /dev/random pool.
Example #1 :
# Python program to explain os.getrandom() method # importing os module import os # Declaring size size = 5 # Using os.getrandom() method # Using os.GRND_NONBLOCK flag result = os.getrandom(size, os.GRND_NONBLOCK) # Print the random bytes string # Output will be different everytime print(result) |
b'5\n\xe0\x98\x15'
Example #2 :
# Python program to explain os.getrandom() method # importing os module import os # Declaring size size = 5 # Using os.getrandom() method # Using os.GRND_RANDOM flag result = os.getrandom(size, os.GRND_RANDOM) # Print the random bytes string # Output will be different everytime print(result) |
b'\xce\xc8\xf3\x95%'
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