python get index of item in 2d list

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

def index_2d(myList, v):
    for i, x in enumerate(myList):
        if v in x:
            return i, x.index(v)

print(index_2d(myList, 3))
# you get
# (1, 0)

Here is what the above code is Doing:
1. enumerate(myList) returns a list of tuples, where each tuple is of the form (index, element).
2. i is the index, and x is the element.
3. if v is in x, then we return the index and the index of v in x.