How do I check the first index of an array of arrays

Say I have a value…

x = 5

and a numpy array of arrays which looks something like…

arr = [[1,2], [3,4], [5,6]]

how would I check the first index of each array (ie. 1, 3, 5) to see if they = x?

>Solution :

You may find any() function useful in this case. It takes a list as an argument, and returns True if any of their arguments evaluate to True (and False otherwise).
Here’s how you do

if any([i[0] == x for i in arr]):