Python链式比较 [英] Python chained comparison

问题描述

我有此代码:

if self.date: # check date is not NoneType
    if self.live and self.date <= now and self.date >= now:
         return True
return False

我的IDE表示:看起来应该简化它，即Python链式比较.

My IDE says: This looks like it should be simplified i.e. Python chained comparison.

什么是链式比较，如何将其简化?

What is a chained comparison and how can it be simplified?

推荐答案

链式比较的示例如下所示.

An example of a chained comparison is shown below.

age = 25

if 18 < age <= 25:
    print('Chained comparison!')

请注意，这实际上是完全相同如下所示，它看起来更好.

Note that beneath the covers this is exactly the same as shown below, it just looks nicer.

age = 25

if 18 < age and age <= 25:
    print('Chained comparison!')

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