zoukankan      html  css  js  c++  java
  • python基础一 day16 匿名函数

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

    add = lambda x,y:x+y
    print(add(1,2))

    dic={'k1':10,'k2':100,'k3':30}
    def func(key):
    return dic[key]
    print(max(dic,key=func)) #根据返回值判断最大值,返回值最大的那个参数是结果
    print(max(dic,key=lambda key:dic[key]))
    max([1,2,3,4,5,-6,-7],key=abs)

    ret = map(abs,[-1,2,-3,4])
    for i in ret:
    print(i)

    def func(x):
    return x**2
    ret = map(func,[-1,2,-3,4])
    for i in ret:
    print(i)

    ret = map(lambda x:x**2,[-1,2,-3,4])


    def func(x):
    return x>10

    res = filter(func,[5,8,11,9,15])
    for i in res:
    print(i)


    min max filter map sorted —— lambda

    d = lambda p:p*2
    t = lambda p:p*3
    x = 2
    x = d(x) #x = 4
    x = t(x) #x = 12
    x = d(x) #x = 24
    print(x)

    ret = zip((('a'),('b')),(('c'),('d')))
    ret = map(lambda t:{t[0]:t[1]},ret)
    print(list(ret))

    现有两元组(('a'),('b')),(('c'),('d')),
    请使用python中匿名函数生成列表[{'a':'c'},{'b':'d'}]

    max min sorted filter map
    匿名函数 == 内置函数
    zip
    ret = zip((('a'),('b')),(('c'),('d')))
    res = map(lambda tup:{tup[0]:tup[1]},ret)
    print(list(res))

    def multipliers():
    return [lambda x:i*x for i in range(4)]
    print([m(2) for m in multipliers()])



  • 相关阅读:
    菜根谭#250
    菜根谭#249
    菜根谭#248
    [转载]将网卡(设备中断)绑定到特定CPU
    request_mem_region,ioremap 和phys_to_virt()
    [转载]python的range()函数用法
    [转载]Python print函数用法,print 格式化输出
    [转载]python datetime处理时间
    Linux驱动
    Linux驱动
  • 原文地址:https://www.cnblogs.com/wang-tan/p/11082291.html
Copyright © 2011-2022 走看看