CODEWITHSUNDEEP
pythonpython-itertools
AJW
AJW

Reputation: 5873

identify zeros in list of list python itertools

I have a look which looks like the following:

yyy=[(2.0, 3.4, 3.75), (2.0, 3.4, 0.0), (2.0, 3.4, 0.0), (2.0, 3.4, 3.5), (2.0, 3.4, 0.0)]

What I would like to do is identify if 0.0 is present in any of the sublists (true or false). So, I follow itertools, but I am unsure how the logic should be constructed.

from itertools import *
selectors = [x is 0 for x in yyy]
#[False, False, False, False, False]

Obviously, my above sytax does not seem right - I was wondering if someone could point me in the right direction for the syntax.

Upvotes: 1

Views: 125

Answers (2)

Eric Urban
Eric Urban

Reputation: 3820

Try [0.0 in x for x in yyy]

>>> yyy=[(2.0, 3.4, 3.75), (2.0, 3.4, 0.0), (2.0, 3.4, 0.0), (2.0, 3.4, 3.5), (2.0, 3.4, 0.0)]
>>> [0.0 in x for x in yyy]
[False, True, True, False, True]
>>>

You were close.

Upvotes: 5

mgilson
mgilson

Reputation: 310049

what about just:

any(0.0 in subtup for subtup in yyy)

demo:

>>> yyy=[(2.0, 3.4, 3.75), (2.0, 3.4, 0.0), (2.0, 3.4, 0.0), (2.0, 3.4, 3.5), (2.0, 3.4, 0.0)]
>>> any(0.0 in subtup for subtup in yyy)
True
>>> yyy=[(2.0, 3.4, 3.75), (2.0, 3.4, 10.0), (2.0, 3.4, 10.0), (2.0, 3.4, 3.5), (2.0, 3.4,10.0)]
>>> any(0.0 in subtup for subtup in yyy)
False

Upvotes: 1

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