相关疑难解决方法(0)

我有这段代码:

numbers = range(1, 50)

for i in numbers:
    if i < 20:
        numbers.remove(i)

print(numbers)

但我得到的结果是:

[2,4,6,8,10,12,14,16,18,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35 ,36,37,38,39,40,41,42,43,44,45,46,47,48,49]

当然我希望结果中没有出现20以下的数字,我假设我在删除时做错了.