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random.setstate() in Python - GeeksforGeeks

Last Updated : 17 May, 2020

module is used to generate random numbers in Python. Not actually random, rather this is used to generate pseudo-random numbers. That implies that these randomly generated numbers can be determined.

The

method of the

module is used in conjugation with the

method. After using the

method to capture the state of the random number generator, the

method is used to restore the state of the random number generator back to the specified state. The

method requires a state object as a parameter which can be obtained by invoking the

method.

# import the random module
import random

# capture the current state
# using the getstate() method
state = random.getstate()

# print a random number of the
# captured state
num = random.random()
print("A random number of the captured state: "+ str(num))

# print another random number
num = random.random()
print("Another random number: "+ str(num))

# restore the captured state
# using the setstate() method
# pass the captured state as the parameter
random.setstate(state)

# now printing the same random number
# as in the captured state
num = random.random()
print("The random number of the previously captured state: "+ str(num))

A random number of the captured state: 0.8059083574308233 Another random number: 0.46568313950438245 The random number of the previously captured state: 0.8059083574308233

# import the random module
import random


list1 = [1, 2, 3, 4, 5]  

# capture the current state
# using the getstate() method
state = random.getstate()

# Prints list of random items of given length 
print(random.sample(list1, 3)) 

# restore the captured state
# using the setstate() method
# pass the captured state as the parameter
random.setstate(state)

# now printing the same list of random
# items
print(random.sample(list1, 3)) 

[5, 2, 4]
[5, 2, 4]

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