9
-9
-0.1111111111111111

a=b=c=d=e=10
a+=1        #相当于a=a+1
b-=3        #相当于b=b-3
c*=10       #相当于c=c*10
d/=8        #相当于d=d/8
e //= 3
print(a)
print(b)
print(c)
print(d)
print(e)

11
7
100
1.25
3

a=(3>2)and(1<2)
print(a)
a=(3>2)and(1>2)
print(a)

True
False

False
True
True
False
True

True
True

>>> requested_toppings = ['mushrooms', 'onions', 'pineapple']
>>>> 'mushrooms' in requested_toppings
True
>>> 'pepperoni' in requested_toppings
False

banned_users = ['andrew', 'carlina', 'david']
user = 'marie'
if user not in banned_users:
    print(user.title() + ', you can post a response if  you wish.')

Marie, you can post a response if  you wish.

True
140711260299952 140711260299952
True

list1 = [11, 22, 33, 44]
list2 = [11, 22, 33, 44]
print(list1 == list2)
print(id(list1), id(list2))
print(list1 is list2)
print(list1 is not list2)

True
1935213154696 1935213155208
False
True

0
12

8
16
2

age = 17
if age >= 18:
    print('You are old enough to vote!')
    print('Have you registered to vote yet?')
else:        #输出这个
    print('Sorry,you are too young to vote.')
    print('Please register to vote as soon as you turn 18!')

Sorry,you are too young to vote.
Please register to vote as soon as you turn 18!

age = 12
if age < 4:
    price = 0
elif age < 18:
    price = 5
elif age < 65:
    price = 10
else:
    price = 5
print('Your admission cost is $' + str(price) + '.')

Your admission cost is $5.

age = 12
if age < 4:
    price = 0
elif age < 18:
    price = 5
elif age < 65:
    price = 10
elif age >= 65:
    price = 5
print('Your admission cost is $' + str(price) + '.')

Your admission cost is $5.

requested_toppings = ['mushrooms', 'extra cheese']
if 'mushrooms' in requested_toppings:    #添加
    print('Adding mushrooms.')
if 'pepperoni' in requested_toppings:    #没有这个，没加进去
    print('Adding pepperoni.')
if 'extra cheese' in requested_toppings: #添加
    print('Adding extra cheese.')
print('\nFinished making your pizza!')

Adding mushrooms.
Adding extra cheese.
Finished making your pizza!

"""会员 >=200  8折
       >=100  9折
       |      不打折
非会员  >=200  9.5折
       |      不打折"""
answer = input('你是会员吗？y/n')
money = float(input('请输入您的购物金额：'))
if answer == 'y':
    if money >= 200:
        print('打8折，最终付款金额为：', money * 0.8)
    elif 200 > money >= 100:
        print("打9折，最终付款金额为：", money * 0.9)
    else:
        print("不打折，最终付款金额为：", money)
else:
    if money >= 200:
        print('打9.5折，最终付款金额为：', money * 0.95)
    else:
        print('不打折，最终付款金额为：', money)

你是会员吗？y/ny
请输入您的购物金额：300
打8折，最终付款金额为： 240.0

"""请输入两个数，输出最大值"""
num_a = int(input("请输入一个整数:"))
num_b = int(input("请输入第二个整数:"))
num_max = num_a if num_a > num_b else num_b
print('两者中最大整数：', num_max)

请输入一个整数:6
请输入第二个整数:7
两者中最大整数： 7

import random     #import调用random模块
secret = random.randint(1,10)     #调用import模块中内置函数randint()生成随机数，随机数为1到10
print('开始游戏')
temp=input('猜数字，请输入数字：')
guess=int(temp)
while guess !=secret:
    temp=input('猜错了,重新输入')
    guess = int(temp)
    if guess==secret:
       print('Yes')
    else:
        if guess<secret:
           print('小了')
        else:
           print('大了')
print('结束了，不玩了')

for 自定义变量 in 可迭代对象:
    循环体
else:
     ...

F i s h C

2550

magicians = ['alice', 'david', 'carolina']
for magician in magicians:
    print(magician)

alice
david
carolina

"""输出100到999之间的水仙花数
例如：153 = 3*3*3 + 5*5*5 + 1*1*1"""
list_i = []
for i in range(100, 1000):
    for item in str(i):
        list_i.append(int(item))
    if i == (list_i[0])**3 + (list_i[1])**3 + (list_i[2])**3:
        print(i)
    list_i.clear()

153
370
371
407

for i in range(1, 10):
    for j in range(1, i+1):
        print(i, '*', j, '=', i*j, end='\t')
    print()

squares = []
for value in range(1,11):   # 生成1到10
    square = value**2
    squares.append(square)
print(squares)

[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

1
2
3
4
5

list1 = ['alice', 'brian', 'candace']
list2 = []
while list1:
    i = list1.pop()
    print("现在打印的是: " + i.title())
    list2.append(i)
print("\n打印了的有:")
for i in list2:
    print(i.title())

现在打印的是: Candace
现在打印的是: Brian
现在打印的是: Alice
打印了的有:
Candace
Brian
Alice

pets = ['dog', 'cat', 'dog', 'goldfish', 'cat', 'rabbit', 'cat']
print(pets)
while 'cat' in pets:
    pets.remove('cat')
print(pets)

['dog', 'cat', 'dog', 'goldfish', 'cat', 'rabbit', 'cat']
['dog', 'dog', 'goldfish', 'rabbit']

while polling_active:
    name = input("请输入姓名：")
    response = input("喜欢爬什么山? ")
    responses[name] = response  # 生成字典
    repeat = input("会带别人去爬山吗(yes/no)")
    if repeat == 'no':
        polling_active = False
print("\n---汇总---")
for name, response in responses.items():
    print(name + "喜欢爬的山是：" + response + '.')

bingo = 'zdb'
answer = input('请输入一句话:')
while True:   # 这里为死循环
    if answer == bingo:
        break
    else:
        answer = input('抱歉，错了，请重新输入（答案正确才能退出游戏）')
print('对咯')

prompt = "请输入你想去的城市，输入为quit则退出："
while True:
    city = input(prompt)
    if city == 'quit':
        break
    else:
        print("I'd love to go to " + city.title() + '!')

"""输入密码，三次机会"""
i = 1
for item in range(3):
    answer = input("请输入密码：")
    if answer == '1234':
        print("密码正确")
        break
    else:
        if i == 3:
            print("三次输入错误，密码锁定，三分钟后解锁！")
        else:
            print("密码错误，请重新输入：")
            i += 1

请输入密码：1111
密码错误，请重新输入：
请输入密码：1234
密码正确

"""输入密码，三次机会"""
i = 1
a = 0
while a < 3:
    answer = input("请输入密码：")
    if answer == '1234':
        print("密码正确")
        break
    else:
        if i == 3:
            print("三次输入错误，密码锁定，三分钟后解锁！")
        else:
            print("密码错误，请重新输入：")
            i += 1
    a += 1

for i in range(10):  #0到9
    if i%2 !=0:    #除2余数非零的有1、3、5、7、9
        print(i)   #if条件满足，continue后面不执行; 即i为1 3 5 7 9 
        continue   #if条件不满足，执行continue后面的；  不满足，即余数为零
    i += 2
    print(i)       #余数为零，输出i+2;   0、2、4、6、8 都加2： 2、4、6、8、10

2
1
4
3
6
5
8
7
10
9

n = 0
i = []
while n < 10:
    n = n + 1
    if n % 2 == 0:  # 如果n是偶数，执行continue语句
        continue    # continue语句会直接继续下一轮循环，后续的print()语句不会执行
    i.append(n)
print(i)

[1, 3, 5, 7, 9]

"""输出1到20之间的所有5的倍数：5,10,15..."""
list1 = []
for item in range(1, 51):
    if item % 5 != 0:
        continue
    else:
        list1.append(item)
print(list1)

[5, 10, 15, 20, 25, 30, 35, 40, 45, 50]

prompt = "请输入一句话，输入quit则停止："
active = True   # 初始化为True
while active:   # 为True时
    message = input(prompt)   # 输入
    if message == 'quit':     # 输入的为True
        active = False        # 改False，则退出了循环
    else:                     # 为True时
        print(message)

[]
[]

[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

{0: True, 1: False, 2: True, 3: False, 4: True, 5: False, 6: True, 7: False, 8: True, 9: False}

[2, 4, 8, 10, 14, 16, 20, 22, 26, 28, 32, 34, 38, 40, 44, 46, 50, 52, 56, 58, 62, 64, 68, 70, 74, 76, 80, 82, 86, 88, 92, 94, 98]

[4, 16, 36, 64, 100]

[1, -2, 3, -4, 5, -6, 7, -8, 9, -10]

bicycles = ['trek', 'cannondale', 'redline', 'specialized']
print(bicycles[0])            #访问第一个
print(bicycles[0].title())    #第一个首字母大写
print(bicycles[-1])          #访问最后一个

trek
Trek
specialized

bicycles = ['trek', 'cannondale', 'redline', 'specialized']
message = 'My first bicyclr was a ' + bicycles[0].title() + '.'   #访问第零个
print(message)

My first bicyclr was a Trek.

1
['zdb', 'zdb', 'c', 'd']

list1=[123,456]
list1 = list1 * 3
print(list1)
print(list1.index(123))      #索引
print(list1.index(123,3,9))   #第三个到第九个

[123, 456, 123, 456, 123, 456]
0      #第0个位置
4      #第4个位置

number = [1,'zdb']
number.append('zdbya')
print(number)
print(len(number))  

[1, 'zdb', 'zdbya']
3

motorcycles = []   #创建空列表，添加元素
motorcycles.append('honda')
motorcycles.append('yamaha')
motorcycles.append('suzuki')
print(motorcycles)

['honda', 'yamaha', 'suzuki']

[1, 'zdb', 'a', 'b']

[1, 'zz', 'zdb']

[1, 2, 'a', 'b', 'c', 'd', 'e']

number = [1, 2, 3, 4, 2]
number.remove(2)   
print(number)

[1, 3, 4, 2]

['zdb']

[1]
zdb

motorcycles = ['handa', 'yamaha', 'suzuki']
print(motorcycles)
motorcycles[0] = 'ducati'     #修改第零个
print(motorcycles)

['handa', 'yamaha', 'suzuki']
['ducati', 'yamaha', 'suzuki']

list4=[4,3,2,5]
list4.sort()   #排序
print(list4)
list4.sort(reverse=True)   #reverse = True
print(list4)

[2, 3, 4, 5]
[5, 4, 3, 2]

['audi', 'bnw', 'subaru', 'toyota']

['toyota', 'subaru', 'bnw', 'audi']

[5, 9, -12, -21, 36]

print(sorted(['bob', 'about', 'Zoo', 'Credit']))

['Credit', 'Zoo', 'about', 'bob']

['Zoo', 'Credit', 'bob', 'about']

def by_name(t):
    return t[1]
def by_score(t):
    return t[0]
L = [('Bob', 75), ('Adam', 92), ('Bart', 66), ('Lisa', 88)]
L2 = sorted(L, key=by_name, reverse=True)   # 成绩倒序
print(L2)
L3 = sorted(L, key=by_score)  # 名字排序
print(L3)

用了sort(cars)方法后的排序:
['audi', 'bnw', 'subaru', 'toyota']
['bnw', 'audi', 'toyota', 'subaru']

[123, 456, 789]
[789, 456, 123]

<list_reverseiterator object at 0x000002338F11CA48>     #迭代器对象
[4, 5, 6, 1, 2, 3]

小甲鱼 3
小布丁 3
黑夜 2
迷途 2
怡静 2

number = [1,'zdb','a','b','c']
print(number[1:3])    #记左不记右
print(number[:3])     # 0,1,2
print(number[1:])
print(number[:])
print(number[-3:])   #后三个

['zdb', 'a']
[1, 'zdb', 'a']
['zdb', 'a', 'b', 'c']
[1, 'zdb', 'a', 'b', 'c']
['a', 'b', 'c']

players = ['charles', 'martina', 'michael', 'florence', 'eli']
print("Here are the first three players on my team:")
for player in players[:3]:
    print(player.title())

Here are the first three players on my team:
Charles
Martina
Michael

[8, 7, 6, 5, 4, 3, 2, 1]
[8, 7, 6, 5, 4, 3, 2, 1]
[8, 6, 4, 2]

76
-98
0

print(max(1,2,3,4,5))
b = 'I love you'                    #y的码最大
print(max(b))
b = [1,18,13,0,-98,34,54,76,32]     #76最大
print(max(b))

5
y
76

tuple1 = (1,2,3,4,5,6,7,8,9)
print(max(tuple1))

9

tuple2=(3.1,2.3,3.4)
print(sum(tuple2))
list1=[1,2,3,4]
print(sum(list1))
print(sum(list1,8))     #list1求和，再与8求和

8.8
10
18

>>> digits = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
>>> min(digits)
0
>>> max(digits)
9
>>> sum(digits)
45

['a', 'b', 'c']
['a', 'b', 'c']

list1 = ['a', 'b', 'c']
list2 = list1[:]
list1.append('cannoli')
list2.append('ice cream')
print(list1)
print(list2)

['a', 'b', 'c', 'cannoli']
['a', 'b', 'c', 'ice cream']

['a', 'b', 'c', 'cannoli', 'ice cream']
['a', 'b', 'c', 'cannoli', 'ice cream']

list1=[789,456,123]
list2=list1[:]     #拷贝，1变2不变
print(list2)
list3=list1       #赋值，修改list1，list3跟着改
print(list3)
list1.sort()
print(list1)
print(list2)
print(list3)

[789, 456, 123]    #list2
[789, 456, 123]    #list3
###################排序list1
[123, 456, 789]
[789, 456, 123]   #list2不变
[123, 456, 789]   #list3跟着变

list1 = [123,456]
list2 = [234,123]
print(list1 > list2)   #只比较第零个
list3 = [123,456]
print((list1<list2) and (list1==list3))   #and运算

False
True

[123, 456, 234, 123]

list5 = [123,['z','zdb'],456]
print('z' in list5)
print('z'in list5[1])  #第一个
print(list5[1][1])

False
True
zdb

list1=[3,2,1,6,5,4]
print(enumerate(list1))
print(list(enumerate(list1)))

<enumerate object at 0x000001DC6B664E58>
[(0, 3), (1, 2), (2, 1), (3, 6), (4, 5), (5, 4)]

['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', '__dir__',
 '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__',
 '__gt__', '__hash__', '__iadd__', '__imul__', '__init__', '__init_subclass__',
 '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', '__new__', '__reduce__',
 '__reduce_ex__', '__repr__', '__reversed__', '__rmul__', '__setattr__', '__setitem__',
 '__sizeof__', '__str__', '__subclasshook__', 'append', 'clear', 'copy', 'count', 'extend',
 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']

[123, 456, 123, 456, 123, 456]
3

requested_toppings = ['mushrooms', 'green peppers', 'extra cheese']
for requested_topping in requested_toppings:     #遍历列表
    print('Adding ' + requested_topping + '.')
print('\nFinished making your pizza!')

Adding mushrooms.
Adding green peppers.
Adding extra cheese.
Finished making your pizza!

requested_toppings = ['mushrooms', 'green peppers', 'extra cheese']
for requested_topping in requested_toppings:     #遍历
    if requested_topping == 'green peppers':
        print('Sorry, we are out of green peppers right now')
    else:
        print('Adding ' + requested_topping + '.')
print('\nFinished making your pizza!')

Adding mushrooms.
Sorry, we are out of green peppers right now
Adding extra cheese.
Finished making your pizza!

requested_toppings = []
if requested_toppings:  #默认非空执行if里面的
    for requested_topping in requested_toppings:
        print('Adding' + requested_topping + '.')
    print('\nFinished making your pizza!')
else:                  #为空时，执行else
    print('Are you sure you want a plain pizza?')

Are you sure you want a plain pizza?

available_toppings = ['mushrooms', 'olives', 'green peppers',
                      'pepperoni', 'pineapple', 'extra cheese']
requested_toppings = ['mushrooms', 'fresh fries', 'extra cheese']   #中间的没有
for requested_topping in requested_toppings:       #遍历需要的列表
    if requested_topping in available_toppings:    #如果需要的在现有的里面
        print('Adding ' + requested_topping + '.')
    else:                                          #如果需要的不在现有的里面
        print("Sorry, we don't have " + requested_topping + '.')
print('\nFinished making your pizza!')

Adding mushrooms.
Sorry, we don't have fresh fries.
Adding extra cheese.
Finished making your pizza!

    dimensions[0] = 250
TypeError: 'tuple' object does not support item assignment

t = (10, [20, 30], 9)
print(t, type(t))
print(t[0], type(t[0]), id(t[0]))
print(t[1], type(t[1]), id(t[1]))
print(t[2], type(t[2]), id(t[2]))
"""这里尝试修改元组里面的列表"""
t[1].append(40)
print(t[1], type(t[1]), id(t[1]))
print(t)

(10, [20, 30], 9) <class 'tuple'>
10 <class 'int'> 140710970368688
[20, 30] <class 'list'> 2374489493896
9 <class 'int'> 140710970368656
[20, 30, 40] <class 'list'> 2374489493896
(10, [20, 30, 40], 9)

tuple1 = (200, 50)
print('原来的:')
for i in tuple1:
    print(1)
tuple1 = (400, 100)
print('现在的:')
for i in tuple:
    print(i)

原来的:
1
1
现在的:
400
100

tuple = (1,2,3,44,55,66,7,8)   #元组不能被修改
print(tuple)
print(tuple[1])     #输出第一个
print(tuple[5:])    #输出第五个及后面；记左不记右
print(tuple[:5])    #输出第五个前面（不包括第五个）
tuple2=tuple[:]
print(tuple2)

(1, 2, 3, 44, 55, 66, 7, 8)
2
(66, 7, 8)
(1, 2, 3, 44, 55)
(1, 2, 3, 44, 55, 66, 7, 8)

temp=(1)
print(temp)
print(type(temp))      #整型
temp2=2,3,4
print(temp2)
print(type(temp2))     #元组，tuple
temp=[]
print(type(temp))      #列表，list 
temp=()
print(type(temp))      #元组
temp=(1,)
print(type(temp))      #元组
temp=1,
print(type(temp))      #元组

1
<class 'int'>
(2, 3, 4)
<class 'tuple'>
<class 'list'>
<class 'tuple'>
<class 'tuple'>
<class 'tuple'>