Python基础-常用的内置函数

内置函数filter

str = ['a', 'b', 'c', 'd']
def fansik(num):
    if num != "a":
        return num

ret = filter(fansik, str)
print(ret)
print(list(ret))

内置函数map

str = ['a', 'd', 'b']
def fansik(num):
    return num + "fansik"
ret = map(fansik, str)
print(ret)
print(list(ret))

内置函数reduce

from functools import reduce
def add1(x, y):
    return x + y
print(reduce(add1, range(1, 101)))

内置函数lambda

from functools import reduce
print(reduce(lambda x, y: x + y, range(1, 101)))