python数组列表、字典、拷贝、字符串

python中字符串方法

 name = "I teased at life as if it were a foolish game"
 print(name.capitalize())#首字母大写
 print(name.count("a"))#查找字符串中a的个数
 print(name.center(50,"-"))#长度为50将name放中间不够的用-补全
 print(name.endswith("ex"))#字符串是否以ex结尾 true \ false
 print(name.expandtabs(tabsize=30))#将tab键转化为多少空格
 print(name.find("k"))#字符串切片
 print(name.format())#格式化输出
 # print(name.format_map({'name'}))
 print('lsjf342'.isalnum())#是否含有数字，有特殊符号不能检测
 print('adK'.isalpha())#是否有大写字母
 print(''.isdecimal())#是否为十进制数
 print(''.isdigit())#是否为整数
 print('a32f'.isidentifier())#是否为合法标识符
 print(name.isspace())#是否为空格
 print(name.istitle())#是否首字母大写
 print(name.isprintable())#是否可以打印 字符串不考虑   tty file,drive file不可打印
 print(name.isupper())#是否全为大写
 print(''
       '*'.join(['','','','']))#字符串拼接
 print(name.ljust(80,"*"))#将字符串放在左边，长度不够80用*补全
 print(name.rjust(10,""))
 print(name.lower())#大写变小写
 print(name.upper())#小写变大写
 print('mark\n'.lstrip())#去左边的特殊符
 print('\nmaek\n'.rstrip())
 print('---')
 p = str.maketrans("abcdef",'')#对应替换
 print("mark".translate(p))
 print(name.replace('a','A',2))#替换
 print(name.rfind('A'))
 print(name.split())#将字符串按照空格分成不同列表
 print(name.split('r'))#按照r分成不同列表
 print(name.splitlines())#按照换行分列表
 print(name.swapcase())#大小写变换
 print(name.title())#单词首字母大写
 print(name.zfill(20))#不够20用0填充

结果输出：
 1 D:\exploit\python\anaconda\python.exe D:/exploit/python/workSapce/day2/string.py
 I teased at life as if it were a foolish game
 5
 --I teased at life as if it were a foolish game---
 False
 I teased at life as if it were a foolish game
 -1
 I teased at life as if it were a foolish game
 True
 True
 True
 True
 True
 False
 False
 True
 False
 1*2*3*4
 I teased at life as if it were a foolish game***********************************
 I teased at life as if it were a foolish game
 i teased at life as if it were a foolish game
 I TEASED AT LIFE AS IF IT WERE A FOOLISH GAME
 mark

 maek
 ---
 m1rk
 I teAsed At life as if it were a foolish game
 -1
 ['I', 'teased', 'at', 'life', 'as', 'if', 'it', 'were', 'a', 'foolish', 'game']
 ['I teased at life as if it we', 'e a foolish game']
 ['I teased at life as if it were a foolish game']
 i TEASED AT LIFE AS IF IT WERE A FOOLISH GAME
 I Teased At Life As If It Were A Foolish Game
 I teased at life as if it were a foolish game

 Process finished with exit code 0

python中拷贝

 import copy#完全复制需要导入的包

 names = "ZhangYan Guyun DingXiaoPing"
 names = ["ZhangYan","Guyuan","LiSi",["nothing","no"],"nothing","WangWu"]

 print(names[0:-1:2])
 print(names[:])
 print(names[::2])
 for i in names:#切片
     print(i)

 '''# name2 = names.copy() #浅拷贝
 name2 = copy.deepcopy(names)#深层次拷贝
 print(name2)
 print(names)
 names[2] = "橡皮"
 names[3][1] = "神马"
 print(names)
 print(name2)#第一层拷贝的数据，第二层拷贝的是内存地址
 '''

 '''names.append("nothing")#结尾插入
 names.insert(2,"nomore")#任意位置插入
 names[1] = "ZhangShan"#修改
 print(names)

 # print(names.index("nothing"))#获得nothing的角标(第一次出现nothing的角标)
 #
 # print(names[names.index("nothing")])
 #
 # print(names.count("nothing"))#计数
 #
 # names.reverse()#反转
 names.sort()#排序 ascii 码排序
 print(names)
 names2 = [1,2,3,4]
 names.extend(names2)#合并
 print(names,names2)
 del names2#删除
 print(names2)
 # print(names[0],names[3])
 # print(names[1:3])#取角标1和角标2
 # print(names[2:])#取角标从2到结束
 # print(names[-1])#取最后一位
 # print(names[-2:])#取值后两位
 # print(names[0:3])#零可以省略

 # names.remove("nothing")
 #
 # del names[2]
 # print(names)
 #
 names.pop()#括号内可以写角标
 print(names)
 '''

结果输出：
1 ['ZhangYan', 'LiSi', 'nothing']
 ['ZhangYan', 'Guyuan', 'LiSi', ['nothing', 'no'], 'nothing', 'WangWu']
 ['ZhangYan', 'LiSi', 'nothing']
 ZhangYan
 Guyuan
 LiSi
 ['nothing', 'no']
 nothing
 WangWu

python字典

 #key-value
 info = {
     'stu1001': "NWuTengLan",
     'stu1002': "LongZeLuoLa",
     'stu1003': "MaLiYa",

 }
 print(info)
 print(info["stu1002"])#存在字典中才可用这种方式查找，容易出错
 info["stu1002"]="泷泽萝拉"
 info["stu1005"]="泷泽萝拉"#存在就修改，不存在就创建
 print(info)
 print(info.get("stu1004"))#不出错的查找

 print('stu1002' in info)#判断是否在字典中

 #del
 # del info["stu1005"]删除
 # info.pop("stu1005")删除
 # info.popitem()随缘删除
 print(info)

运行结果：
1 {'stu1003': 'MaLiYa', 'stu1002': 'LongZeLuoLa', 'stu1001': 'NWuTengLan'}
 LongZeLuoLa
 {'stu1003': 'MaLiYa', 'stu1005': '泷泽萝拉', 'stu1002': '泷泽萝拉', 'stu1001': 'NWuTengLan'}
 None
 True
 {'stu1003': 'MaLiYa', 'stu1005': '泷泽萝拉', 'stu1002': '泷泽萝拉', 'stu1001': 'NWuTengLan'}

python数组列表

　　输出数组第一层，让操作者输入数据，查看数据是否在第一层内，在的话就进入第二层，不在得话重新选择，以此类推。如果用户输入b返回，输入q退出

 data = {
     'china':{
         "北京":{
             "朝阳区":["区政府","七天酒店"],
             "海淀区":["航空大学","地铁十号线"]
         },
         "河南":{
             "郑州市":["桂林路","新区"],
             "开封市":["民权","老城区"]
         },

     },
     'USA':{
         "加州":{},
         "佛罗里达州":{}
     },

 }

 exitFlag = False

 while not exitFlag:
     for i in data:
         print(i)
     choice = input("选择进入》》")
     if choice in data:
         for i2 in data[choice]:
             print(i2)
         choice2 = input("选择进入》》")
         if choice2 in data[choice]:
             for i3 in data[choice][choice2]:
                 print(i3)
             choice3 = input("选择进入》》")
             if choice3 in data[choice][choice2]:
                 for i4 in data[choice][choice2][choice3]:
                     print(i4)
                 choice4 = input("最后一层，按b返回》》")
                 if choice4 == "b" or choice4 == "B":
                     pass
                 elif choice4 =="q" or choice4 == "Q":
                     exitFlag = True#跳出循环
             if choice3 == "b" or choice3 == "B":
                 pass#返回
             elif choice3 == "q" or choice3 == "Q":
                 exitFlag = True
         if choice2 == "b" or choice2 == "B":
             break#跳出循环
         elif choice2 =="q" or choice2 == "Q":
             exitFlag = True