2019-08-05 作业

1.写一个生成式能够产生的数据为: 1, 4, 27, 256, 3125,…, 9**9

print(list(x ** x for x in range(1,10)))

2.写一个生成式能够产生1-10中所有半径是偶数的圆的面积

import math
print(list(math.pi * (x ** 2) for x in range(1,11) if not(x % 2)))

3.写一个生成式交换字段的键和值，产生一个新的字典

dict1 = {'a':1, 'b':2, 'c':3}
print(dict((dict1[key], key) for key in dict1))

4.为函数写一个装饰器，在函数执行之后输出 after

def add_after(fn):
    def func(*args, **kwargs):
        fn(*args, **kwargs)
        print('after')
    return func

@add_after
def test():
    print('=====')

test()

5.为函数写一个装饰器，把函数的返回值 +100 然后再返回

def add_hundred(fn):
    def func(*args, **kwargs):
        return fn(*args, **kwargs) +100
    return func

@add_hundred
def test_sum(x, y):
    return x + y

print(test_sum(10, 20))

6.写一个装饰器@tag要求满足如下功能:
@tag
def render(text):
# 执行其他操作
return text

@tag
def render2():
return 'abc'

print(render('Hello')) # 打印出: <p>Hello</p>
print(render2()) # 打印出: <p>abc</p>

def tag(fn):
    def func(*args, **kwargs):
        return  '<p>' + fn(*args, **kwargs) + '</p>'
    return func

@tag
def render(text):
    return text

@tag
def render2():
    return 'abc'

print(render('Hello'))
print(render2())

7.写一个装饰器@tag要求满足如下功能:
@tag(name='p')
def render(text):
# 执行其他操作
return text

@tag(name='div')
def render2():
return 'abc'

print(render('Hello')) # 打印出: <p>Hello</p>
print(render2()) # 打印出: <div>abc</div>

def tag(name):
    def adorn(fn):
        def func(*args, **kwargs):
            return '<' + name + '>' + fn(*args, **kwargs) + '</' + name + '>'
        return func
    return adorn

@tag(name='p')
def render(text):
    return text

@tag(name='div')
def render2():
    return 'abc'

print(render('Hello'))
print(render2())

8.为函数写一个装饰器，根据参数不同做不同操作。
flag为True，则 让原函数执行后返回值加100，并返回。
flag为False，则 让原函数执行后返回值减100，并返回。

def tag(flag:bool):
    def adorn(fn):
        def func(*args, **kwargs):
            if flag:
                return fn(*args, **kwargs) + 100
            else:
                return fn(*args, **kwargs) - 100
        return func
    return adorn

@tag(flag=True)
def sum(x, y):
    return x + y

print(sum(10, 20))

@tag(flag=False)
def sum(x, y):
    return x + y

print(sum(100,200))

9.写一个斗地主发牌器

import random
from collections import defaultdict

poker = {'hearts':['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K'],
         'spade':['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K'],
         'cube':['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K'],
         'plum_blossom':['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K'],
         'king':['large','little']
}

framer_a = defaultdict(list)
framer_b = defaultdict(list)
landlord = defaultdict(list)

number = 54
order = 0

while number > 3:
    color = random.choice(list(poker.keys()))
    count = random.randint(0,len(poker[color])-1)
    i = order % 3
    if i == 0:
        landlord[color] .append(poker[color][count])
    elif i == 1:
        framer_a[color] .append(poker[color][count])
    else:
        framer_b[color] .append(poker[color][count])
    del poker[color][count]
    if len(poker[color]) == 0:
        poker.pop(color)
    number -= 1
    order += 1

end_poker = poker.copy()

for x in poker:
    for i in range(len(poker[x])):
        landlord[x].append(poker[x][i])

print('农民1：',dict(framer_a))
print('农民2：',dict(framer_b))
print('地主：',dict(landlord))
print('底牌：',dict(end_poker))