• 练习——函数


     

    一、题目:

      1. 文件内容如下,标题为:姓名,性别,年纪,薪资

    egon male 18 3000
    alex male 38 30000
    wupeiqi female 28 20000
    yuanhao female 28 10000

        要求: 从文件中取出每一条记录放入列表中,列表的每个元素都是{'name':'egon','sex':'male','age':18,'salary':3000}的形式

      2. 根据1得到的列表,取出薪资最高的人的信息

      3. 根据1得到的列表,取出最年轻的人的信息

      4. 根据1得到的列表,将每个人的信息中的名字映射成首字母大写的形式

      5. 根据1得到的列表,过滤掉名字以a开头的人的信息

      6. 使用递归打印斐波那契数列(前两个数的和得到第三个数,如:0 1 1 2 3 4 7...)

      7. 一个嵌套很多层的列表,如l=[1,2,[3,[4,5,6,[7,8,[9,10,[11,12,13,[14,15]]]]]]],用递归取出所有的值

    二、解答

    1. 

    l1 = []
    l2 = ['name', 'sex', 'age', 'salary']
    with open('homework.py') as f:
        for i in f:
            res = i.strip().split(' ')
            user_dict = {k: v for k, v in zip(l2, res)}
            l1.append(user_dict)
    print(l1)
    with open('homework.py') as f:
        items = (line.split() for line in f)
        info = [{'name': name, 'sex': sex, 'age': age, 'salary': salary} for name, sex, age, salary in items]
    print(info)

    2.  

    l = [{'name': 'egon', 'sex': 'male', 'age': '18', 'salary': '3000'}, {'name': 'alex', 'sex': 'male', 'age': '38', 'salary': '30000'}, {'name': 'wupeiqi', 'sex': 'female', 'age': '28', 'salary': '20000'}, {'name': 'yuanhao', 'sex': 'female', 'age': '28', 'salary': '10000'}]
    rich = max(l, key = lambda i: i['salary'])
    print(rich)

    3. 

    l = [{'name': 'egon', 'sex': 'male', 'age': '18', 'salary': '3000'}, {'name': 'alex', 'sex': 'male', 'age': '38', 'salary': '30000'}, {'name': 'wupeiqi', 'sex': 'female', 'age': '28', 'salary': '20000'}, {'name': 'yuanhao', 'sex': 'female', 'age': '28', 'salary': '10000'}]
    young = min(l, key = lambda i: i['age'])
    print(young)

    4. 

    l = [{'name': 'egon', 'sex': 'male', 'age': '18', 'salary': '3000'}, {'name': 'alex', 'sex': 'male', 'age': '38', 'salary': '30000'}, {'name': 'wupeiqi', 'sex': 'female', 'age': '28', 'salary': '20000'}, {'name': 'yuanhao', 'sex': 'female', 'age': '28', 'salary': '10000'}]
    info = filter(lambda i: not i['name'].startswith('a'), l)
    print(list(info))

    5. 

    def outer():
        a = 0
        b = 1
        c = 0
        def inner():
            nonlocal a, b, c
            print(a)
            c = a + b
            b = a
            a = c
            inner()
        return inner
    
    outer()()
    a = 0
    b = 1
    c = 0
    def x():
        t = 0
        while t < 100:
            global a, b, c
            print(a)
            c = a + b
            b = a
            a = c
            t += 1
    x()
    a = 0
    b = 1
    c = 0
    
    def x():
        global a, b, c
        print(a)
        c = a + b
        b = a
        a = c
        x()
    
    x()
    x = 0
    y = 1
    count = 0
    while count < 10:
        print(x)
        x, y = y, x + y
        count += 1
    def func(x, y, end=999):
        if x > end:
            return

    6.

    l = [1,2,[3,[4,5,6,[7,8,[9,10,[11,12,13,[14,15]]]]]]]
    
    def x():
        global l
        for i in l:
            if isinstance(i, int):
                print(i)
            if isinstance(i, list):
                l = l.pop()
                x()
    x()
  • 相关阅读:
    vue-常用指令汇总
    vue-插槽和具名插槽
    vue-传值校验
    vue-动态组件
    vue-组件
    zend studio 快捷键收集
    php调试工具firephp
    zend studio插件
    MySQL各个版本区别
    PHP 中 Date 函数与实际时间相差8小时的解决方法
  • 原文地址:https://www.cnblogs.com/binyuanxiang/p/11588326.html
Copyright © 2020-2023  润新知