基于迭代器的方法很好。进行一些细微的修改可以强调您正在计数的事实：
sum(1 if meets_condition(x) else 0 for x in my_list)
# or
sum(1 for x in my_list if meets_condition(x))
和往常一样，如果意图从代码中不明显，则将其封装在描述性命名的函数中：
def count_matching(condition, seq):
"""Returns the amount of items in seq that return true from condition"""
return sum(1 for item in seq if condition(item))
count_matching(meets_condition, my_list)
602392714
清零编程群