python_day2

01、多级菜单

data = {
    '北京':{
        "昌平":{
            "沙河":["oldboy","test"],
            "天通苑":["链家地产","我爱我家"]
        },
        "朝阳":{
            "望京":["奔驰","陌陌"],
            "国贸":{"CICC","HP"},
            "东直门":{"Advent","飞信"},
        },
        "海淀":{},
    },
    '山东':{
        "德州":{},
        "青岛":{},
        "济南":{}
    },
    '广东':{
        "东莞":{},
        "常熟":{},
        "佛山":{},
    },
}
exit_flag = False

while not exit_flag:
    for i in data:
        print(i)
    choice = input("选择进入1>>:")
    if choice in data:
        while not exit_flag:
            for i2 in data[choice]:
                print("\t",i2)
            choice2 = input("选择进入2>>:")
            if choice2 in data[choice]:
                while not exit_flag:
                    for i3 in data[choice][choice2]:
                        print("\t\t", i3)
                    choice3 = input("选择进入3>>:")
                    if choice3 in data[choice][choice2]:
                        for i4 in data[choice][choice2][choice3]:
                            print("\t\t",i4)
                        choice4 = input("最后一层，按b返回>>:")
                        if choice4 == "b":
                            pass
                        elif choice4 == "q":
                            exit_flag = True
                    if choice3 == "b":
                        break
                    elif choice3 == "q":
                        exit_flag = True
            if choice2 == "b":
                break
            elif choice2 == "q":
                exit_flag = True

 02、字典

info = {
    'stu1101': "TengLan Wu",
    'stu1102': "LongZe Luola",
    'stu1103': "XiaoZe Maliya",
}

for i in info:
    print(i,info[i])

for k,v in info.items():
    print(k,v)

03、列表

names = "ZhangYang Guyun Xiangpeng XuLiangChen"
names = ["4ZhangYang", "#!Guyun","xXiangPeng",["alex","jack"],"ChenRonghua","XuLiangchen"]
print(names[0:-1:2])
print(names[::2])
print(names[:])
range(1,10,2)

for i in names:
    print(i)

name2 = copy.deepcopy(names)
print(names)
print(name2)
names[2] = "向鹏"
names[3][0] ="ALEXANDER"

print(names)
print(name2)
names.append("LeiHaidong")
names.insert(1,"ChenRonghua")
names.insert(3,"Xinzhiyu")
names[2] ="XieDi"

print(names[0],names[2])
print(names[1:3]) #切片
print(names[3]) #切片
print(names[-2:]) #切片
print(names[0:3]) #切片
print(names[:3]) #切片

delete
names.remove("ChenRonghua")
del names[1] =names.pop(1)
names.pop(1)
print(names)
print(names.index("XieDi"))
print(   names[names.index("XieDi")]   )

print(names.count("ChenRonghua"))
names.clear()
names.reverse()
names.sort()
print(names)

names2 = [1,2,3,4]
names
names.extend(names2)#合并names 和names2
del names2
print(names,names2)

04、列表应用

product_list = [
    ('Iphone',5800),
    ('Mac Pro',9800),
    ('Bike',800),
    ('Watch',10600),
    ('Coffee',31),
    ('Alex Python',120),
]
shopping_list = []
salary = input("Input your salary:")
if salary.isdigit():
    salary = int(salary)
    while True:
        for index,item in enumerate(product_list):
            #print(product_list.index(item),item)
            print(index,item)
        user_choice = input("选择要买嘛？>>>:")
        if user_choice.isdigit():
            user_choice = int(user_choice)
            if user_choice < len(product_list) and user_choice >=0:
                p_item = product_list[user_choice]
                if p_item[1] <= salary: #买的起
                    shopping_list.append(p_item)
                    salary -= p_item[1]
                    print("Added %s into shopping cart,your current balance is \033[31;1m%s\033[0m" %(p_item,salary) )
                else:
                    print("\033[41;1m你的余额只剩[%s]啦，还买个毛线\033[0m" % salary)
            else:
                print("product code [%s] is not exist!"% user_choice)
        elif user_choice == 'q':
            print("--------shopping list------")
            for p in shopping_list:
                print(p)
            print("Your current balance:",salary)
            exit()
        else:
            print("invalid option")

05、字符串操作

name = "my \tname is {name} and i am {year} old"

print(name.capitalize())
print(name.count("a"))
print(name.center(50,"-"))
print(name.endswith("ex"))
print(name.expandtabs(tabsize=30))
print(name[name.find("name"):])
print(name.format(name='alex',year=23))
print(name.format_map(  {'name':'alex','year':12}  ))
print('ab23'.isalnum())
print('abA'.isalpha())
print('1A'.isdecimal())
print('1A'.isdigit())
print('a 1A'.isidentifier()) #判读是不是一个合法的标识符
print('33A'.isnumeric())
print('My Name Is  '.istitle())
print('My Name Is  '.isprintable()) #tty file ,drive file
print('My Name Is  '.isupper())
print('+'.join( ['1','2','3'])  )
print( name.ljust(50,'*')  )
print( name.rjust(50,'-')  )
print( 'Alex'.lower()  )
print( 'Alex'.upper()  )
print( '\nAlex'.lstrip()  )
print( 'Alex\n'.rstrip()  )
print( '    Alex\n'.strip()  )
p = str.maketrans("abcdefli",'123$@456')
print("alex li".translate(p) )

print('alex li'.replace('l','L',1))
print('alex lil'.rfind('l'))
print('1+2+3+4'.split('\n'))
print('1+2\n+3+4'.splitlines())
print('Alex Li'.swapcase())
print('lex li'.title())
print('lex li'.zfill(50))

06、列表操作

person=['name',['saving',100]]
'''
p1=copy.copy(person)
p2=person[:]
p3=list(person)
'''
p1=person[:]
p2=person[:]

p1[0]='alex'
p2[0]='fengjie'

p1[1][1]=50

print(p1)
print(p2)