How to generate random numbers in Python?
Randomness plays an important role in the evolution of machine learning algorithms. Python defines a set of functions that are used to generate or manipulate random numbers. This particular type of functions are used in random initialization of weights in an artificial neural networks, splitting of data into random train and test sets, games, lotteries or any application requiring random number generation.
In this article, you will learn how to generate and work with random numbers in Python.
1. choice() function
import random print (random.choice([1, 4, 8, 10, 3]))
2. randrange(beginning, end, step) :- This function is also used to generate random number but within a range specified in its arguments.
# using randrange() to generate in range from 10 # to 50. The last parameter 2 is step size to skip # two numbers when selecting. print (random.randrange(10, 50, 3))
3. Random floating numbers using random() and seed() functions
# random number generator using seed from random import seed from random import random # seed random number generator seed(1) # generate some random numbers print(random()) # reset the seed seed(2) # generate some random numbers print(random())
4. Random Integer numbers using randint() function
value = randint(0, 10) print(value)
5. Random Gaussian numbers using gauss() function
value = gauss(0, 1) print(value)