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python - 使用 Python 使用随机范围遍历列表

问题描述

我对 Python 很陌生，所以如果这个问题非常基本，请原谅我，但我已经尝试过搜索，但还没有找到实现这样的方法的方法。

我正在使用随机步骤遍历两个数字的范围，并打印出一些关于它们的信息。到目前为止，这是我的代码：

from random import randint

#generate random number between 200 and 400
step = randint(200,400)
num = 0

for x in range(440000,450000,step):
    num = num + 1
    print("{}: {}km, increased by {}km".format(num,x,step))

我希望能够打印出 step 变量并为循环的每次迭代（随机）改变它，但是代码只给我一个值，每次迭代都会重复。这是一个示例输出：

1: 440000km, increased by 274km
2: 440274km, increased by 274km
3: 440548km, increased by 274km
4: 440822km, increased by 274km
5: 441096km, increased by 274km
6: 441370km, increased by 274km
7: 441644km, increased by 274km
8: 441918km, increased by 274km
9: 442192km, increased by 274km
10: 442466km, increased by 274km
11: 442740km, increased by 274km
12: 443014km, increased by 274km
13: 443288km, increased by 274km
14: 443562km, increased by 274km
15: 443836km, increased by 274km
16: 444110km, increased by 274km

我将如何让我的循环真正随机？任何和所有的帮助将不胜感激。

谢谢！

标签： pythonpython-3.x

解决方案

由于采取了初始步骤，因此您无法使用for循环执行此操作（由于 C/C++循环遗留问题，可以在循环中修改步骤或当前索引，因此经常会出现混淆）。rangefor

我会选择一个经典的while循环：

from random import randint

#generate random number between 200 and 400
num = 0

x = 440000

while True:
    num += 1
    step = randint(200,400)
    x += step
    if x >= 450000:
        break
    print("{}: {}km, increased by {}km".format(num,x,step))

结果：

1: 440380km, increased by 380km
2: 440586km, increased by 206km
3: 440975km, increased by 389km
4: 441221km, increased by 246km
5: 441545km, increased by 324km
6: 441803km, increased by 258km
7: 442080km, increased by 277km
8: 442476km, increased by 396km
9: 442822km, increased by 346km
10: 443179km, increased by 357km
11: 443536km, increased by 357km
12: 443779km, increased by 243km
13: 444170km, increased by 391km
14: 444449km, increased by 279km
15: 444791km, increased by 342km
16: 445023km, increased by 232km
...
28: 449154km, increased by 348km
29: 449431km, increased by 277km
30: 449647km, increased by 216km
31: 449890km, increased by 243km

我不确定限制检查，所以我没有做while x < 450000，而是使用了无限循环，所以我可以在之后添加和检查（否则，我觉得我无法“模拟”for循环。

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