mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-12-18 17:20:16 +00:00
9316e7c014
* flake8 --max-line-length=88
* fixup! Format Python code with psf/black push
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
38 lines
1.1 KiB
Python
38 lines
1.1 KiB
Python
__author__ = "Tobias Carryer"
|
|
|
|
from time import time
|
|
|
|
|
|
class LinearCongruentialGenerator:
|
|
"""
|
|
A pseudorandom number generator.
|
|
"""
|
|
|
|
def __init__(self, multiplier, increment, modulo, seed=int(time())):
|
|
"""
|
|
These parameters are saved and used when nextNumber() is called.
|
|
|
|
modulo is the largest number that can be generated (exclusive). The most
|
|
efficient values are powers of 2. 2^32 is a common value.
|
|
"""
|
|
self.multiplier = multiplier
|
|
self.increment = increment
|
|
self.modulo = modulo
|
|
self.seed = seed
|
|
|
|
def next_number(self):
|
|
"""
|
|
The smallest number that can be generated is zero.
|
|
The largest number that can be generated is modulo-1. modulo is set in the
|
|
constructor.
|
|
"""
|
|
self.seed = (self.multiplier * self.seed + self.increment) % self.modulo
|
|
return self.seed
|
|
|
|
|
|
if __name__ == "__main__":
|
|
# Show the LCG in action.
|
|
lcg = LinearCongruentialGenerator(1664525, 1013904223, 2 << 31)
|
|
while True:
|
|
print(lcg.next_number())
|