Python. Write a function that takes in a list and returns the first nonzero entry.

def nonzero(lst):

""" Returns the first nonzero element of a list

>>> nonzero([1, 2, 3])

1

>>> nonzero([0, 1, 2])

1

>>> nonzero([0, 0, 0, 0, 0, 0, 5, 0, 6])

5

""" "*** YOUR CODE HERE ***"