Use any
:
Demo:
>>> from collections import namedtuple
>>> A = namedtuple('A', 'x y')
>>> lis = [A(100, 200), A(10, 20), A(1, 2)]
>>> any(a.x==1 for a in lis)
True
>>> [getattr(a, 'x')==1 for a in lis]
[False, False, True]
質問
I want to see if a namedtuple exists in a list, similar to:
numbers = [1, 2, 3, 4, 5]
if 1 in numbers:
do_stuff()
is there a pythonic (or not) way to do this? Something like:
namedtuples = [namedtuple_1, namedtuple_2, namedtuple3]
if (namedtuple with value x = 1) in namedtuples:
do stuff()
解決
Use any
:
Demo:
>>> from collections import namedtuple
>>> A = namedtuple('A', 'x y')
>>> lis = [A(100, 200), A(10, 20), A(1, 2)]
>>> any(a.x==1 for a in lis)
True
>>> [getattr(a, 'x')==1 for a in lis]
[False, False, True]