生成假设为 python 的随机数数组

Question

我有一个似乎工作正常的排序算法，但我想用随机样本对其进行更多测试。因此，为了对其进行测试，我尝试生成假设为 Python 的随机数组，我希望这些数组具有不同的长度并包含任何随机数。然而，假设似乎停留在只用数字“1”填充数组

这是我的代码：

def mysorting_function function(ArrToSort):
    #...

@given (
    i= lists( integers(min_value=1) )
    )
def test_partition(i):
    #sort the random array i
    mysorting_function(i)
    #run the test to check if it is sorted
    for i in range( len(i)-1):
        assert a[i]<= a[i+1]

然而，当我打印测试输出时，假设生成的样本是：

[1]
[1]
[1, 1]
[1, 1, 1]
[1, 1, 1, 1]
[1, 1, 1, 1, 1]
[1]
[1]

如果我删除 min_value=1，我得到的数组为 0，如果我输入 min_value=2，我得到的数组只有 2！这很奇怪，我希望这些值是随机的。

有人可以帮我解释一下我做错了什么吗？有没有我需要初始化的随机种子？缺少参数？我的导入有问题吗？

提前致谢

p.s：我知道还有其他方法可以生成随机列表，但我想开始使用假设:)

Answer 1

from hypothesis.strategies import lists, integers, given


def func(i):
    return sorted(i)


@given(i=lists(integers(min_value=1, max_value=1e12)))
def test_partition(i):
    a = func(i)
    for k in range(len(i) - 1):
        print(f"Given: {i}")
        assert a[k] <= a[k + 1]

运行使用 pytest tmp.py -s

platform darwin -- Python 3.6.12, pytest-6.0.2, py-1.9.0, pluggy-0.13.1
rootdir: /Users/krishna.singh
plugins: hypothesis-5.36.1
collected 1 item

tmp.py Given: [], Sorted: []
Given: [1], Sorted: [1]
Given: [1], Sorted: [1]
Given: [1], Sorted: [1]
Given: [1], Sorted: [1]
Given: [122661386], Sorted: [122661386]
Given: [1], Sorted: [1]
Given: [1], Sorted: [1]
Given: [1], Sorted: [1]
Given: [], Sorted: []
Given: [1], Sorted: [1]
Given: [274042271187, 26280, 3469576980, 62595], Sorted: [26280, 62595, 3469576980, 274042271187]
Given: [26280, 26280, 3469576980, 62595], Sorted: [26280, 26280, 62595, 3469576980]
Given: [131, 58771, 43, 459711760009, 22071, 2072838034, 796926885113, 970422184418, 1757], Sorted: [43, 131, 1757, 22071, 58771, 2072838034, 459711760009, 796926885113, 970422184418]
Given: [33286, 58771, 43, 459711760009, 22071, 2072838034, 796926885113, 970422184418, 1757], Sorted: [43, 1757, 22071, 33286, 58771, 2072838034, 459711760009, 796926885113, 970422184418]
Given: [225, 2063187514, 59787, 30, 19115], Sorted: [30, 225, 19115, 59787, 2063187514]
Given: [32241, 222], Sorted: [222, 32241]
Given: [32241, 222], Sorted: [222, 32241]
Given: [467990765333], Sorted: [467990765333]
Given: [467990765333, 467990765333, 4223774210, 223411433807, 56529], Sorted: [56529, 4223774210, 223411433807, 467990765333, 467990765333]
Given: [467990765333, 467990765333, 33276335, 223411433807, 56529], Sorted: [56529, 33276335, 223411433807, 467990765333, 467990765333]
Given: [467990765333, 467990765333, 4223774210, 223411433807, 56529], Sorted: [56529, 4223774210, 223411433807, 467990765333, 467990765333]
Given: [467990765333, 467990765333, 33276335, 309, 33610961], Sorted: [309, 33276335, 33610961, 467990765333, 467990765333]
Given: [467990765333, 467990765333, 33610961, 309, 33610961], Sorted: [309, 33610961, 33610961, 467990765333, 467990765333]
Given: [467990765333, 467990765333], Sorted: [467990765333, 467990765333]
Given: [59, 29978, 362493699905, 134, 58229], Sorted: [59, 134, 29978, 58229, 362493699905]
Given: [14851, 29978, 362493699905, 134, 58229], Sorted: [134, 14851, 29978, 58229, 362493699905]
Given: [14851, 29978, 362493699905, 134, 58229], Sorted: [134, 14851, 29978, 58229, 362493699905]
Given: [14851, 29978, 362493699905, 134, 58229], Sorted: [134, 14851, 29978, 58229, 362493699905]
Given: [142, 489066059452], Sorted: [142, 489066059452]
Given: [605624009221, 146, 34956, 601792711832, 57058, 36345, 11448, 28, 65312, 61727, 48367, 31458, 31641, 560287896129, 26498], Sorted: [28, 146, 11448, 26498, 31458, 31641, 34956, 36345, 48367, 57058, 61727, 65312, 560287896129, 601792711832, 605624009221]
Given: [36099, 4395827713], Sorted: [36099, 4395827713]
Given: [36099, 4395827713], Sorted: [36099, 4395827713]
Given: [36099, 4395827713, 3329724595], Sorted: [36099, 3329724595, 4395827713]
Given: [36099, 263, 4362142151], Sorted: [263, 36099, 4362142151]

我可能在打印过程中做错了什么，但是正如您所看到的，假设库生成了不同的输出

生成假设为 python 的随机数数组

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