func = lambda x : x**2

func:函数名

lambda:类似def的关键字

x:参数

x**2:返回值表达式

l = [-2,5,6,1,0,4,12]

print(list(filter(lambda x: x % 3 == 0,l)))  #[6, 0, 12]

print(list(sorted(l,key=lambda x:x**2)))     #[0, 1, -2, 4, 5, 6, 12]

ret = zip((('a'),('b')),(('c'),('d')))

print(list(map(lambda x: {x[0]:x[1]},ret))) #[{'a': 'c'}, {'b': 'd'}]

d = lambda p:p*2

t = lambda p:p*3

x = 2

x = d(x)

x = t(x)

x = d(x)

print(x)    #

#请修改multipliers的定义来产生期望的结果。

def multipliers():

    return [lambda x:i*x for i in range(4)]

print([m(2) for m in multipliers()])        #[6, 6, 6, 6]