Counts the occurrences of a value in a list.

Increment a counter for every item in the list that has the given value and is of the same type.


def count_occurrences(lst, val):
  return len([x for x in lst if x == val and type(x) == type(val)])


count_occurrences([1, 1, 2, 1, 2, 3], 1) # 3