列表中的特定范围(python) [英] Specific range within a list (python)

问题描述

我有一个从文本字符串中提取的整数列表，所以当我打印列表(我称之为 test)时，我得到:

I have a list of integers which I have extracted from a string of text, so when I print the list (which I have called test) I get:

['135', '2256', '1984', '3985', '1991', '1023', '1999']

并且我想打印或制作一个仅包含特定范围内的数字的新列表，例如1000-2000 之间.我尝试了以下操作，但它仍然返回原始列表中的所有项目.

and I want to print or make a new list containing only numbers within a certain range, e.g. between 1000-2000. I tried the following, but it still returns all of the items in my original list.

for i in test:
    if i>1000:
        print i
    elif i<2000:
        print i

我不明白为什么它仍然会打印低于 1000 或高于 2000 的数字.

And I can't work out why it would still be printing numbers below 1000 or above 2000.

推荐答案

首先将字符串列表转换为整数列表:

First convert your list of strings to a list of ints:

ints_list = [int(x) for x in test]

然后您可以根据需要过滤此列表.我们可以使用像上面一行这样的列表理解来做到这一点.注意 和 使得数字必须满足两个条件才能出现在列表中.

Then you can filter this list however you would like. We can do this with a list comprehension like the above line. Notice the and that makes it so that the number has to meet both conditions to be in the list.

filtered_list = [x for x in ints_list if x > 1000 and x < 2000]

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