1.写一个生成式能够产生的数据为: 1, 4, 27, 256, 3125,…, 9**9
nums=(x**x for x in range(1,10))
print(list(nums))#[1, 4, 27, 256, 3125, 46656, 823543, 16777216, 387420489]
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
S=(x**2*math.pi for x in range(1,11) if not x%2)
print(list(S))
#[12.566370614359172, 50.26548245743669, 113.09733552923255, 201.06192982974676, 314.1592653589793]
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":4,"c":5}
change_key=dict((value,key) for key,value in dict1.items())
print(change_key)#{1: 'a', 4: 'b', 5: 'c'}
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 inner(*args,**kwargs):
fn(*args,**kwargs)
print("After")
return inner
@add_after
def print_alpha():
print("asdfgg")
print_alpha()
#asdfgg
#After
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 inner(*args,**kwargs):
fn(*args, **kwargs)
return args[0]+100
return inner
@add_hundred
def print_num(x):
return x
print(print_num(67))
#167
6.写一个装饰器@tag要求满足如下功能:
def tag(fn):
def inner(*args,**kwargs):
return ""+fn(*args,**kwargs)+"
"
return inner
@tag
def render2():
return 'abc'
@tag
def render(text):
return text
print(render2())#abc
print(render("Hello"))#Hello
6.写一个装饰器@tag要求满足如下功能(需要使用带参的装饰器，自己先自学正在一下):
image.png
def tag(name):
def outer(fn):
def inner(*args, **kwargs):
return "<{0}>{1}<{0}>".format(name, fn(*args))
return inner
return outer
@tag(name="p")
def render(text):
return text
print(render("hello"))#hello
@tag(name='div')
def render2():
return 'abc'
print(render2())#
abc
7.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 fun(flag):
def outer(fn):
def inner(*args, **kwargs):
if flag == True:
return fn(*args) + 100
else:
return fn(*args) - 100
return inner
return outer
@fun(flag=True)
def print_num(x):
return x
print(print_num(100))
@fun(flag=False)
def print_num(x):
return x
print(print_num(100))
8.写一个斗地主发牌器
Cards = set()
for hua in ["♤", "♡", "♢", "♧"]:
for num in ["A", 2, 3, 4, 5, 6, 7, 8, 9, 10, "J", "Q", "K"]:
Cards.add(str(hua) + str(num))
Cards.add("JOKER")
Cards.add("Joker")
print(len((list(Cards))))
iter1 = iter(Cards)
cards_list1 = []
cards_list2 = []
cards_list3 = []
def Shuffle_the_deck(farmer1_cards, farmer2_cards, landlord_cards):
for i in range(17):
farmer1_cards()
farmer2_cards()
landlord_cards()
def farmer1_cards():
cards_list1.append(next(iter1))
return cards_list1
def farmer2_cards():
cards_list2.append(next(iter1))
return cards_list2
def landlord_cards():
cards_list3.append(next(iter1))
return cards_list3
Shuffle_the_deck(farmer1_cards, farmer2_cards, landlord_cards)
print("农名1的牌：", cards_list1)
print("农名1的牌：", cards_list2)
excess_cards = []
excess_cards.append(next(iter1))
excess_cards.append(next(iter1))
excess_cards.append(next(iter1))
print("抓地主：",excess_cards)
print("地主的牌：" , cards_list3 + excess_cards)
#农名1的牌： ['♤7', '♧4', '♤10', '♧2', '♧5', '♢7', '♧6', '♤3', '♢8', '♤4', '♡5', '♡K', '♢10', '♡2', '♤Q', '♤5', '♤8']
#农名2的牌： ['Joker', '♢4', '♡4', '♧Q', '♡Q', '♤9', '♧A', '♢A', '♧7', '♢K', '♢3', '♢5', '♡6', '♧9', '♧K', '♧10', '♤2']
#抓地主： ['♧J', '♢J', '♤6']
#地主的牌： ['JOKER', '♤J', '♡7', '♡J', '♤A', '♢9', '♢6', '♡9', '♢Q', '♡10', '♧8', '♤K', '♧3', '♡3', '♢2', '♡A', '♡8', '♧J', '♢J', '♤6']