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- import random as r
- r.seed(10)
- for _ in range(100):
- i = r.randint(1, 10)
- assert i <= 10
- assert i >= 1
- i = r.random()
- assert 0.0 <= i <= 1.0
- i = r.uniform(3.0, 9.5)
- assert 3.0 <= i <= 9.5
- a = [1, 2, 3, 4]
- r.shuffle(a)
- for i in range(10):
- assert r.choice(a) in a
- for i in range(10):
- assert r.choice(tuple(a)) in a
- for i in range(10):
- assert r.choice('hello') in 'hello'
- for i in range(10):
- assert r.randint(1, 1) == 1
- # test choices
- x = (1,)
- res = r.choices(x, k=4)
- assert (res == [1, 1, 1, 1]), res
- w = (1, 2, 3)
- assert r.choices([1, 2, 3], (0.0, 0.0, 0.5)) == [3]
- try:
- r.choices([1, 2, 3], (0.0, 0.0, 0.5, 0.5))
- exit(1)
- except ValueError:
- pass
- try:
- r.choices([])
- exit(1)
- except IndexError:
- pass
- seq = [1, 2, 3, 4]
- weights = [0.1, 0.2, 0.2, 0.5]
- k = 1000
- res = r.choices(seq, weights, k=k)
- assert len(res) == k and isinstance(res, list)
- max_error = 0.03
- for i in range(len(seq)):
- actual_w = res.count(seq[i]) / k
- assert abs(actual_w - weights[i]) < max_error
- # test seed
- from random import randint, seed
- seed(7)
- a = randint(1, 100)
- b = randint(-2**60, 1)
- c = randint(50, 100)
- assert (a, b, c) == (16, -418020281577586157, 76)
- seed(7)
- assert a == randint(1, 100)
- assert b == randint(-2**60, 1)
- assert c == randint(50, 100)
- import random
- assert random.Random(7).randint(1, 100) == a
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