一：map函数

def addone(x):    return  x+1def changeList(func,list):    newList=[]    for i in list:        res=func(i)        newList.append(res)    return newList#不使用lambda函数qq=changeList(addone,[1,2,3])print(qq)#使用lambda函数print(changeList(lambda x:x+1,[1,2,3]))#使用map函数print(list(map(lambda x:x+1,[1,2,3])))

二：filter函数

 

def test(x):    return  x.startswith("a")def filter_test(func,list):    newList=[]    for i in list:        if not func(i):            newList.append(i)    return newList#不使用lambda函数qq=filter_test(test,["aer","dsa","fds"])print(qq)#使用lambda函数print(filter_test(lambda x:x.startswith("a"),["aer","dsa","fds"]))#使用filter函数print(list(filter(lambda x:not x.startswith("a"),["aer","dsa","fds"])))

 

三：reduce函数

 

from functools import reducedef multi(x,y):    return x*ydef reduce_test(func,x,init=None):    if init is None:        res=x.pop(0)    else:        res=init    for num in x:        res=func(res,num)    return res#不适用lambda表达式print(reduce_test(multi,[1,2,3,4,5,6]))#使用lambda表达式print(reduce_test(lambda x,y:x*y,[1,2,3,4,5,6]))#reduce函数print(reduce(lambda x,y:x*y,[1,2,3,4,5,6]))