python 笔记

时间：2016-11-01 19:06:28 阅读：313 评论：0 收藏：0 [点我收藏+]

标签：ati 字符串处理 new git www 嵌套模块 nan cto

第一周2016/9/11

Python 2.0和3.0的区别

3.0 的模块名改了和之前的2.0 不一样

#!/usr/bin/env python

# -*- coding:utf-8 -*- 加 utf8

>>> user="123" 2.0打印

>>> print user

123

Print（user） 3.0打印

变量

Name=”hanwei” #姓名

name=”hanwei” #姓名

注释 # ‘’’ ‘’’

2.0

>>> a=raw_input("your name:")

your name:123

>>> print a

123

3.0

>>> a=input("your name:")

your name:123

>>> print a

123

格式化字符串

#!/usr/bin/env python

name=input("your name:")

age=int(input("your age:")) %d代表小数必须像这样

job=input("your job:")

%s 小数或字符串 %f 浮点数 %d 小数

msg=‘‘‘

Name:%s

Age:%d

Job:%s

‘‘‘%(name,age,job)

print(msg)

ASCI码叫阿克斯码

Ascl 本身没有加入utf8 加入utf8才有中文

8个bi等于一个字节

1024个字节等于1kb

#####################

Ascl 查询规律

Ab-----69----------ascl码

输入密码不显示密码

import getpass

username = input("username:")

password = getpass.getpass()

print(username,password)

判断次数输入密码

user = "hanwei"
passwd = "789"

username = input("username")
password = input("password")

if user == username:
    print("username is corerct....")
    if password == passwd:
        print("Wlecome login....")
    else:
        print("password is invalid...
else:
    print("no no no")

判断输入密码器

user = "hanwei"
passwd = "789"
username = input("username:")
password = input("password:")

if username == user and password == passwd:
print("Welcome login")
else:
print("mima huo yonghu mong cuowu")

猜数字

#!/usr/bin/env python
# -*- coding:utf-8 -*-

age = 22
guess_num = int(input("input your guess num:"))  init 转为数字
if guess_num == age:
    print("you git lt")
elif guess_num > age:
    print("da le")
else:
    print("xiaole")

猜数字2

age = 22

for i in range(10):

if i <3:

guess_num = int(input("input your guess num:"))

if guess_num == age:

print("you git lt")

break

elif guess_num > age:

print("da le")

else:

print("xiaole")

else:

print("cishi taiduo")

break

列表---其他叫做数组

定义数组

name=["zhangsan","lisi","wangwu","liu","xie","zhou"]

打印

name[1:3][1][3]

name[1:3]

name[-2:]

name[-1]

name[4]

name[:2]

修改

name[4] = "xietingfeng"

插入

name.insert(4,‘hanwei‘)

删除

name.remove("liu")

打印所有

>>> name

[‘zhangsan‘, ‘lisi‘, ‘wangwu‘, ‘hanwei‘, ‘xietingfeng‘, ‘zhou‘, ‘alix‘]

if 9 in name:
    num = name.count(9)  统计9的个数
    pos = name.index(9)  找出索引
    name[pos] = 999      改

    print(name)

循环改改所有
name = ["zhangsan","lisi","wangwu","sunliu","liu0",1,1,3,5,4,8,98,9,10,11,9,9,9]
for i in range(name.count(9)):
    ele = name.index(9)
    name[ele] = 9999999999
    print name

扩展

name = ["zhangsan","lisi","wangwu","sunliu","liu0"]
name2 = ["hanweiu","lini"]

name.extend(name2)
print(name)

打印嵌套

name = ["zhangsan","lisi",["li","a"],"wangwu","sunliu","liu0"]

print name [2][0]

反向排序

name = ["zhangsan","lisi",["li","a"],"wangwu","sunliu","liu0"]
name.reverse()
print name

排序

name = ["zhangsan","lisi",["li","a"],"wangwu","sunliu","liu0"]
name.sort()
print name

考被列表

name = ["zhangsan","lisi",["li","a"],"wangwu","sunliu","liu0"]
name2 = name.copy()
print(name2)

删除

name = ["zhangsan","lisi",["li","a"],"wangwu","sunliu","liu0"]
name.pop(2)
print name

不长（比如 1.3.5排序）

name = ["zhangsan","lisi",["li","a"],"wangwu","sunliu","liu0"]

print (name[::2])

删除

name = ["zhangsan","lisi",["li","a"],"wangwu","sunliu","liu0"]
del name[1]
print (name[::2])

完全拷贝

name = ["zhangsan","lisi","wangwu","sunliu","liu0"]

name4 = copy.deepcopy(name)
print(name4)

猜数字2

age = 22
count = 0
for i in range(10):
    if count<3:
        print(count)
        guess_num = int(input("input your guess num:"))
        if guess_num == age:
            print("you git lt")
            break
        elif guess_num > age:
            print("da le")
        else:
            print("xia ole")
    else:
        con = input("hai yao ji xu ma:")
        if con == ‘y‘:
            count = 0
            continue
        else:

            print("exit")
            break
    count += 1

字符串处理

name = "alex,jack,rain"

name2 = name.split(",") 转换成列表

print(name2)

print("|".join(name2)) 换成 |

删掉多余前后空格

username=input("user:")

if username.strip() == ‘alex‘:
print("welcome")‘‘‘

name = "alex li"

print(name[2:4]) 打印指定字符

print(name.center(40,‘-‘))    打印40不满40 前后加—

print(name.find("li"))        查找

print(‘‘ in name)             查找空格

print(name.capitalize())     第一个字母换成大写

变量

msg="Hello, {name}, it‘s been along {age} since last tiem...."
msg2=msg.format(name=‘mimng hu‘,age=‘33‘)
print(msg2)

变量
msg2="hahah {0}, dddd {1}"
print(msg2.format(‘alex‘,‘aa‘))

避免输入的不是数字报错

age = input("your age:")

‘‘‘if age. isdigit():      避免
    age = int(age)
else:
    print("nono")‘‘‘

name=‘alex3sdf‘
print(name.isalnum())       判断是否是字母或者数字
print(name.endswith(‘f‘))   判断结尾是否是f
print(name.startswith(‘a‘)) 判断开头是否是a
print(name.upper().lower())  大小写转换

While 死循环

count=0
while True:

    count+=1
    if count>50 and count<60:   50-60之间退出循环
        continue
    print("你是风儿我是沙")
    print(count)

    if count == 100:
        print("穿上裤子走天涯")
        print(count)
        break

字典

id_db = {
     412728199004125331:{
         ‘name‘:"hanwei",
         ‘age‘: 18,
         ‘addr‘:‘henan‘
     },
     41272819900512331: {
         ‘name‘:"shanpao",
         ‘age‘:24,
         ‘addr‘:‘shandong‘
     },
}

#print(id_db[412728199004125331]) 打印k值

#id_db[41272819900512331][‘name‘]="minghu" 修改

#del id_db[41272819900512331]          删除

#id_db[41272819900512331].pop("addr") 删除

#v=id_db.get(41272819900512331) 判断是否存在

#v=id_db[41272819900512331] 负值k值

#print(id_db)
dic2={
‘name‘:‘hanhanhan‘,
222012000:{‘name‘:‘wang‘},
}
#print(dic2)

#id_db.update(dic2) 更新如果只存在覆盖不存在追加
#print(id_db)

#print(id_db) # 打印字典

#print(id_db.items()) 转换成元祖
#print(id_db.values()) 打印values

#print(id_db.keys()) 打印keys

#41272819900512331 in id_db 判断一个值是否存在

#print(id_db.setdefault(41272819900412533,"hhh")) 判断一个不存在就追加

循环字典
for key in id_db:
print(key,id_db[key])

购物车

salary=input("input your salery:")

if salary.isdigit():
    salary=int(salary)
else:
    exit("shu ru cuo wu")

welcom_msg="welcom wo hanwei shopping mall".center(50,‘-‘)
print(welcom_msg)

exit_flag = False
product_list=[
    (‘iphoen‘,5888),
    (‘mac air‘,8000),
    (‘mac pro‘,9000),
    (‘xiaomi 2‘,19.9),
    (‘tesla‘,820000),
    (‘bike‘,700),
    (‘cloth‘,200),
    (‘coffee‘,30),
]

shop_car=[]
while exit_flag is not True:
    print("product list".center(50,‘-‘))
    for item in enumerate(product_list):
        index=item[0]
        p_name=item[1][0]
        p_price=item[1][1]
        print(index,‘.‘,p_name,p_price)

    user_choice = input("[q=quit,c=check],what do your want to buy:")
    if user_choice.isdigit():
        user_choice=int(user_choice)
        if user_choice <len(product_list):
            p_item=product_list[user_choice]
            if p_item[1] <=salary:
               shop_car.append(p_item)
               salary -= p_item[1]
               print("added[%s]into shop car,you current balance is \033[31:1m[%s]"
                  %( p_item,salary))
        else:
               print("your balance is [%s], nono.." % salary)
    else:
        if user_choice == ‘q‘ or user_choice == ‘quit‘:
            print("ni yi tui chu".center(40,‘*‘))
            for item in shop_car:
                 print(item)
            print("END".center(40,‘*‘))
            print("nide yu ge shi [%s]" % salary)
            print("Bye")
            exit_flag = True
        elif user_choice == ‘c‘ or user_choice == ‘check‘:
            print("ni yi tui chu".center(40, ‘*‘))
            for item in shop_car:
                print(item)
            print("END".center(40, ‘*‘))
            print("nide yu ge shi [%s]" % salary)
            print("Bye")

Set

s1={11,22,33}
s2={22,33,44}
#s3=s1.difference(s2)   a中存在b中不存在
#s3=s1.symmetric_difference(s2) a中不存在和b中不存在

#s1.difference_update(s2)    a中存在b中不存在跟新到a中

#s3=s1.intersection(s2) 找出a和b相同的   叫做交集

#s1.symmetric_difference_update(s2)   a和b中不存在德跟新到a中

#s1.discard(11) 删除不存在不报错

#s1.remove(22) 删除不存在报错

#s1.pop()      随机删除

#s1.intersection_update(s2) 把a和b相同的更新到a中

#s3=s1.union(s2) 并集

#{33, 22, 11, 44}

添加
#s1.add(99)

#li=[88,66,99]
#s1.update(li)

练习题

old_dict={
    "#1":8,
    "#2":4,
    "#4":2,
}

new_dict={
    "#1":4,
    "#2":4,
    "#3":2,
}

拿到keys
new_set=set(new_dict.keys())
old_set=set(old_dict.keys())

remove_set=old_set.difference(new_set) 需要删除的
add_set=new_set.difference(old_set) 需要添加的
update_set=old_set.intersection(new_set) 需要更新的

#!/usr/bin/env python

http://www.cnblogs.com/spykids/p/5163108.html
shopping_list = [
    [‘Iphone 6s plus‘,5800],
    [‘Lumia‘,3800],
    [‘Charge‘,45],
    [‘Data line‘,35],
    [‘MI 5 PRO‘,2299],
    [‘MI 4‘,1999],]

salary = 100000

total = 0

shop_list = []

while True:
    welcom_1 = "XXX购物商城欢迎你"
    we_1 = welcom_1.center(30,‘*‘)
    print(we_1)

    choice_1 = "1.注册 2.登录 q。退出"
    ch_1 = choice_1.center(30,‘*‘)

    exit_1 = "谢谢使用，欢迎下次光临"
    ex_1 = exit_1.center(30,‘*‘)

    error_1 = "你输入的用户已存在，请重新输入"
    e_1 = error_1.center(30,‘*‘)

    error_2 = "密码不能为空，请重新输入"
    e_2 = error_2.center(30,‘*‘)

    error_3 = "输入的密码太短，请重新输入"
    e_3 = error_3.center(30,"*")

    error_4 = "你输入有误，请重新输入"
    e_4 = error_4.center(30,‘*‘)

    error_5 = "你的账号已锁定，请联系管理员"
    e_5 = error_5.center(30,‘*‘)

    print(ch_1)
    sr_1 = input("Please input:")
    if sr_1 == ‘1‘:
        while True:
            with open(‘ming.txt‘,‘r‘)as r_1:
                temp = r_1.readlines()
                tlist = []

            for tline in temp:
                  tline = tline.strip().split(‘:‘)
                  tlist.append(tline[0])
            useradd = input("Please create user:")
            s_1 = ‘成功创建用户：%s‘ %(useradd)

            if useradd in tlist:
                print(e_1)
            elif useradd == ‘exit‘:
                break
            else:
                  passwd = input(‘Please create a password:‘)
                  lenth = len(passwd)
                  if lenth == 0 :
                      print(e_2)
                  elif lenth > 7:
                      with open(‘ming.txt‘,‘a‘)as r_3:
                          w_1 = ‘%s:%s:0\n ‘ %(useradd,passwd)
                          r_3.write(w_1)
                          s_1 = s_1.center(30,‘*‘)
                          print(s_1)
                          break
                  else:
                      print(e_3)

    elif sr_1 == ‘2‘:
        flag = False
        while True:
            username = input("Please enter a  user name:")
            l = open(‘lock.txt‘,‘r‘)
            for lline in l.readlines():
                lline = lline.strip()
                if username == lline:
                    print("账号已经锁定")
                    flag = True
                    l.close()
                    break
            if flag == True:
                break

            u = open(‘ming.txt‘,‘r‘)
            for uline in u.readlines():
                user,password,mony = uline.strip().split(‘:‘)
                if username == user:
                  i = 0
                  while i < 3:
                    passwd = input(‘Please enter a password:‘)
                    i +=1
                    if passwd == password:
                        print(‘你好欢迎登陆购物平台‘)
                        flag = True
                        u.close()
                        break
                    else:
                        if i >= 3:
                            with open(‘lock.txt‘,‘a‘) as l_2:
                                l_2.write(username + ‘\n‘)
                                l_2.close()
                            exit("错误过多，账号已锁定，请联系管理员")
                        print(‘密码输入错误，还有%d次机会‘%(3 - i))
                  break
            else:
                print("用户输入错误，请重新输入")
                break
            while True:

                print("1.购物 2.查看购物车 3.查看余额 4.充值 b.返回 q.退出")
                print("--------------------------------------------------")
                choice_2 = input(‘请选择‘)
                flag_1 = False
                while True:
                    if choice_2 == "1":
                        while True:
                            for index,g in enumerate(shopping_list):
                                print(index,g[0],g[1])
                            print(‘--------------‘)
                            print(‘c.查看购物车 b.返回 q.退出‘)
                            choice = input(‘请选择商品:‘).strip()
                            if choice.isdigit():
                                choice = int(choice)
                                p_price = shopping_list[choice][1]
                                if p_price < salary:
                                    shop_list.append(shopping_list[choice])
                                    total += p_price
                                    salary -= p_price
                                    print(‘------------------‘)
                                    print(‘你购买了%s,余额%s‘%(shopping_list[choice][0],salary))
                                    print(‘------------------‘)
                                else:
                                    print(‘--------------------‘)
                                    print(‘余额不足，请充值‘)
                                    print(‘--------------------‘)
                            elif choice == "c":
                                while True:
                                    print(‘-------你已进入购物车-------‘)
                                    for k,v in enumerate(shop_list):
                                        print(k,v[0],v[1])
                                        print("已消费金额为:%s"%total)
                                        print("你的余额为:%s"%salary)
                                        print(‘--------------------------‘)
                                        print("d.删除商品，b.返回 q.退出")
                                        print(‘--------------------------‘)
                                        choce_1 = input(‘请选择‘)
                                        print(‘--------------------------‘)
                                        if choce_1 == ‘d‘:
                                            print(‘-------------------------‘)
                                            print(‘选择要删除的商品 b.返回购物车：‘)
                                            print(‘-------------------------‘)
                                            while True:
                                                choice_2 = input(‘请选择:‘)
                                                if choice_2.isdigit():
                                                    choice_2 = int(choice_2)
                                                    d_price = shop_list[choice_2][1]
                                                    shop_list.remove(shop_list[choice_2])
                                                    total -= d_price
                                                    salary += d_price
                                                    print(‘----------------‘)
                                                    print("商品%s删除成功,余额为%s"%(shop_list[choice_2][0],salary))
                                                    print(‘-----------------‘)
                                                elif choice_2 == ‘b‘:
                                                    break
                                        elif choice_1 == ‘b‘:
                                            flag = True
                                            break
                                        else:
                                            print(‘-----购物清单------‘)
                                            for k,v in enumerate(shop_list):
                                                print(k,v[0],v[1])
                                                print(‘总消费金额为:%s‘%total)
                                                print(‘你的可用余额:%s‘%salary)
                                                print(‘-----欢迎下次再来-----‘)
                                                exit(0)
                            elif choice == "b":
                                break
                            elif choice == ‘q‘:
                                print(‘------购物清单------‘)
                                for k,v in enumerate(shop_list):
                                    print(k,v[0],v[1])
                                print(‘消费金额为:%s‘%total)
                                print(‘你的可用余额为:%s‘%salary)
                                print(‘------欢迎再次光临------‘)
                                exit(0)
                            else:
                                print(‘----------------‘)
                                print(‘你输入错误，请重新输入！‘)
                                print(‘-------------------‘)
                        if flag == True:
                            break
                    elif choice_2 == ‘2‘:
                        print(‘-----购物车-------‘)
                        for k,v in enumerate(shop_list):
                            print(k,v[0],v[1])
                        print(‘已消费金额为:%s‘%total)
                        print(‘你的余额为:%s‘%salary)
                        print(‘--------------------‘)
                        break
                    elif choice_2 == ‘3‘:
                        with open(‘ming.txt‘,‘r‘)as m_1:
                            mony_1 = m_1.readlines()
                        for mline in mony_1:
                            (user,password,mony) = mline.strip().split(‘:‘)
                            print(salary)
                            flag_1 = True
                            break
                        break
                    elif choice_2 == ‘4‘:
                        z = 0
                        while z < 1:
                            chongzhi = int(input(‘输入金额：‘))
                            passwd_1 = input(‘输入密码:‘)
                            m = open(‘ming.txt‘,‘r+‘)
                            m_2 = m.readlines()
                            for mline in m_2:
                                (user,password,mony) = mline.strip().split(‘:‘)
                                if passwd_1 == password:
                                    mony_2 = (chongzhi + int(mony))
                                    w_2 = ‘%s:%s:%s‘%(username,password,mony_2)
                                    m.write(w_2)
                                    print(‘充值成功‘)
                                    print(mony)
                                    flag = True
                                    break
                                continue
                            break
                        if flag == True:
                            break
                    elif choice_2 == ‘b‘:
                        flag = True
                        break
                    elif choice_2 == ‘q‘:
                        exit(ex_1)
                    else:
                        print(e_4)
                        break
                    break
                if flag == True:
                    break
            break
    elif sr_1 == ‘q‘:
        exit(ex_1)
    else:
        print(e_4)
        print(‘--------------------------------‘)

三级菜单

http://www.2cto.com/kf/201512/453371.html

 1 import re
 2 memu = {
 3     ‘东北‘:{
 4         ‘吉林省‘:{
 5             ‘吉林市‘:[‘吉林市1‘,‘吉林市2‘],
 6             ‘长春‘:[‘长春1‘,‘长春2‘],
 7         },
 8         ‘辽宁省‘:{
 9             ‘沈阳‘:[‘沈阳1‘,‘沈阳2‘],
10             ‘大连‘:[‘大连1‘,‘大连2‘],
11 
12         },
13     },
14     ‘华北‘:{
15         ‘河北‘:{
16             ‘廊坊‘:[‘廊坊1‘,‘廊坊2‘],
17             ‘保定‘:[‘保定1‘,‘保定2‘],
18         },
19         ‘内蒙古‘:{
20             ‘呼和浩特‘:[‘呼和浩特1‘,‘呼和浩特2‘],
21             ‘包头‘:[‘包头1‘,‘包头2‘]
22         },
23     },
24 }
25 
26 flag = True
27 while flag:
28     for i,v in enumerate(memu.keys()):
29         print(i,v)
30     num_1 = input(‘请输入一级菜单号 q.退出:‘)
31     if num_1 == ‘q‘:
32         flag = True
33         break
34     if num_1.isdigit():
35         num_1 = int(num_1)
36         if num_1 <= len(memu):
37             key_1 = list(memu.keys())[num_1]
38             while flag:
39                 for i1,v1 in enumerate(memu[key_1]):
40                     print(i1,v1)
41                 num_2 = input(‘请输入二级菜单号 q.退出 b.返回:‘)
42                 if num_2 == ‘q‘:
43                     flag = False
44                     break
45                 if num_2 == ‘b‘:
46                     break
47                 if num_2.isdigit():
48                     num_2 = int(num_2)
49                     if num_2 <= len(memu[key_1]):
50                         key_2 = list(memu[key_1].keys())[num_2]
51                         while flag:
52                             for i2,v2 in enumerate(memu[key_1][key_2]):
53                                 print(i2,v2)
54                             num_3 = input(‘请输入三级菜单号 q.退出 b.返回:‘)
55                             if num_3 == ‘q‘:
56                                 flas = False
57                                 break
58                             if num_3 == ‘b‘:
59                                 break
60                             if num_3.isdigit():
61                                 num_3 = int(num_3)
62                                 if num_3 <= len(memu[key_1][key_2]):
63                                     key_3 = list(memu[key_1][key_2].keys())[num_3]
64                                     while flag:
65                                         print(‘最后一页！‘)
66                                         for i3,v3 in enumerate(memu[key_1][key_2][key_3]):
67                                             print(i3,v3)
68                                         num_4 = input(‘q.退出 b.返回:‘)
69                                         if num_4 == ‘q‘:
70                                             flag = False
71                                             break
72                                         if num_4 == ‘b‘:
73                                             break


购物车
http://www.cnblogs.com/spykids/p/5163108.html

python 笔记

标签：ati 字符串处理 new git www 嵌套模块 nan cto

原文地址：http://www.cnblogs.com/hanwei999/p/6020323.html

踩

(0)

评论一句话评论（0）

分享档案

更多>

2021年07月29日 (22)
2021年07月28日 (40)
2021年07月27日 (32)
2021年07月26日 (79)
2021年07月23日 (29)
2021年07月22日 (30)
2021年07月21日 (42)
2021年07月20日 (16)
2021年07月19日 (90)
2021年07月16日 (35)

周排行

python 笔记

Python 2.0和3.0的区别

变量

格式化字符串

ASCI码叫阿克斯码

输入密码不显示密码

判断次数输入密码

判断输入密码器

猜数字

猜数字2

列表---其他叫做数组

定义数组

打印

修改

插入

删除

打印所有

扩展

打印嵌套

反向排序

排序

考被列表

删除

不长 （比如 1.3.5排序）

删除

完全拷贝

猜数字2

字符串处理

避免输入的不是数字报错

While 死循环

字典

购物车

不长（比如 1.3.5排序）