'list' 和 'int' 的实例之间不支持类型错误 '>='

Question

我收到以下代码的类型错误：

import random


def f(x):
    return x**2


def Sample(npts):
    sample = []

# Generate random numbers from 0 to 10.
randomlist = []
for _ in range(npts):  # just counting from 0 to npts-1
    r = random.random() # random.random() generates numbers from 0 to 1, including 0.2 etc.
    r *= 10  # convert to 0 to 10 range
    assert r >= 0 and r <= 10, "random number r should be in [0, 10]"  # verify that r is in [0, 10]
    randomlist.append(r)  # save to a list

# Save result of function f
for v in randomlist: # get each item in the list
    y = f(v)
    sample.append(y)

return sample


# start
npts = 100
result = Sample(npts)
print(f'result length: {len(result)}')
print(f'result: {result}')

我认为这是因为我试图在 int 和 list 之间进行检查。我了解到您可以使用 numpy 按预期计算它，但是，我不太明白，所以如果有人可以向我解释，我将非常感激。

Answer 1

鉴于提供的代码示例，我实际上无法重新创建您的初始 TypeError。话虽如此，您的代码可以简化很多 - 不需要assert 的值r，或相对乘法。这个怎么样：

import random

def compute_sample(npts):
    return [ random.uniform(0.0, 10.0)**2 for _ in range(npts) ]

# start
result = compute_sample(100)
print(f'result length: {len(result)}')
print(f'result: {result}')