元组列表中元组之间的差异

Question

In Python, I have a list of tuples, that is:

list_tup = [('123', 'A'), ('123', 'B')]

If I want to find out if there is, for example, the tuple ('123', 'A') , I just write:

('123', 'A') in list_tup
=> True

But what if I'd like to know if there's anything different from ('123', 'B') in that list of tuples, where the only different element is the second one ('B') ? Is it possible?

For example, I want to know if in list_tup there is something different from ('123', 'B').

Answer 1

You can do something like:

any(tup for tup in list_tup if tup[0] == '123' and tup[1] != 'B')

Basically filters the list of tuples to those that have '123' as the first value and not 'B' as the second value, and returns True if there are any (haha).

But you can also modify this to get the list of all tuples that match the criteria by switching any to list .