Python chained comparison [duplicate]

Question

I have this code:

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

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

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

Answer 1

An example of a chained comparison is shown below.

age = 25

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

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!')