Performing a logical or operation of multiple lists in Python

Question:

I have a list containing some number of sublists. 

list1=[ [True,False,True,False], [False,False,True,False],[True,False,True,True], .....]

I want to perform a logical or of these sublists in Python but the number of sublists is unknown. For two lists I can do numpy.logical_or but how can I do it for multiple sublists?

Asked By: AMisra

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Source

Answers:

@Ian’s answer is better than my original answer. zip all of the lists to combine their elements columnwise, performing a transposition, and run each column into any:

>>> matrix = [
...     [True, False, True, False],
...     [False, False, True, False],
...     [True, False, True, True],
... ]
>>> [any(column) for column in zip(*matrix)]
[True, False, True, True]

I removed my original answer which is suboptimal.

Answered By: ggorlen

Following up @ggorlen’s answer

list1 = [ 
    [True,False,True,False], 
    [False,False,True,False],
    [True,False,True,True]
]
[any(l) for l in zip(*list1)]

Output

[True, False, True, True]
Answered By: Ian