Python——内置高阶函数

import functools

内置的高阶函数

reduce: 根据指定函数的功能对容器类型中的每一个数据进行相关的计算

filter: 根据指定函数的功能对容器类型中数据进行过滤

def sum_num(x, y):
return x + y

my_list = [1, 2, 3]

result = functools.reduce(sum_num, my_list)

print(result)

result = functools.reduce(lambda x, y: x - y, my_list)
print(result)

my_tuple = (1, 3, 6, 0)

new_filter = filter(lambda x: x > 2, my_tuple)
print(new_filter)

把过滤的结果对象装成元组

new_tuple = tuple(new_filter)
print(new_tuple)

my_list = [1, 3, 6, 0]

new_filter = filter(lambda x: x % 2 == 0, my_list)
print(new_filter)

new_list = list(new_filter)
print(new_list)

使用filter过滤数据

my_list = [{“name”: “李四”, “age”: 15}, {“name”: “张三”, “age”: 20}, {“name”: “王五”, “age”: 30}]

使用reduce 计算1-100之间的数字累加和