计算出现次数
计算列表中某个值的出现次数。
- 使用
list.count()方法计算lst中val的出现次数。
def count_occurrences(lst, val):
return lst.count(val)
count_occurrences([1, 1, 2, 1, 2, 3], 1) # 3
计算列表中某个值的出现次数。
list.count()方法计算lst中val的出现次数。def count_occurrences(lst, val):
return lst.count(val)
count_occurrences([1, 1, 2, 1, 2, 3], 1) # 3