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.
代码实现
def count_occurrences(lst, val):
return len([x for x in lst if x == val and type(x) == type(val)])使用样例
count_occurrences([1, 1, 2, 1, 2, 3], 1) # 3