str = ['a', 'b', 'c', 'd']

def fansik(num):

    if num != "a":

        return num

ret = filter(fansik, str)

print(ret)

print(list(ret))

str = ['a', 'd', 'b']

def fansik(num):

    return num + "fansik"

ret = map(fansik, str)

print(ret)

print(list(ret))

from functools import reduce

def add1(x, y):

    return x + y

print(reduce(add1, range(1, 101)))

from functools import reduce

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