random.random（）与random.uniform（）是否相同？

Question

What is the difference between python's random.random() method and random.uniform() method?

Are the result from random.random() not uniformly distributed?

import random

print(random.random() * 10)
print(random.uniform(0,10))

Answer 1

This is the definition of random.uniform from the random.py module:

def uniform(self, a, b):
    return a + (b-a) * self.random()

So, yes, it's the same distribution.

Answer 2

According to documentation , random.random() returns a number in the range [0, 1.0), when random.uniform(a,b) returns a number in range [a,b] or [a,b), depending on floating-point rounding in equation a + (ba) * random() .

So both print(random.random() * 10) and print(random.uniform(0,10)) can give you the same distribution.