python数组列表字典拷贝字符串

Posted 2020-11-18 MARK_REAPER

python中字符串方法

 1 name = "I teased at life as if it were a foolish game"
 2 print(name.capitalize())#首字母大写
 3 print(name.count("a"))#查找字符串中a的个数
 4 print(name.center(50,"-"))#长度为50将name放中间不够的用-补全
 5 print(name.endswith("ex"))#字符串是否以ex结尾 true  false
 6 print(name.expandtabs(tabsize=30))#将tab键转化为多少空格
 7 print(name.find("k"))#字符串切片
 8 print(name.format())#格式化输出
 9 # print(name.format_map({‘name‘}))
10 print(‘lsjf342‘.isalnum())#是否含有数字，有特殊符号不能检测
11 print(‘adK‘.isalpha())#是否有大写字母
12 print(‘222‘.isdecimal())#是否为十进制数
13 print(‘2‘.isdigit())#是否为整数
14 print(‘a32f‘.isidentifier())#是否为合法标识符
15 print(name.isspace())#是否为空格
16 print(name.istitle())#是否首字母大写
17 print(name.isprintable())#是否可以打印 字符串不考虑   tty file,drive file不可打印
18 print(name.isupper())#是否全为大写
19 print(‘‘
20       ‘*‘.join([‘1‘,‘2‘,‘3‘,‘4‘]))#字符串拼接
21 print(name.ljust(80,"*"))#将字符串放在左边，长度不够80用*补全
22 print(name.rjust(10,"9"))
23 print(name.lower())#大写变小写
24 print(name.upper())#小写变大写
25 print(‘mark
‘.lstrip())#去左边的特殊符
26 print(‘
maek
‘.rstrip())
27 print(‘---‘)
28 p = str.maketrans("abcdef",‘123456‘)#对应替换
29 print("mark".translate(p))
30 print(name.replace(‘a‘,‘A‘,2))#替换
31 print(name.rfind(‘A‘))
32 print(name.split())#将字符串按照空格分成不同列表
33 print(name.split(‘r‘))#按照r分成不同列表
34 print(name.splitlines())#按照换行分列表
35 print(name.swapcase())#大小写变换
36 print(name.title())#单词首字母大写
37 print(name.zfill(20))#不够20用0填充

结果输出：
 1 D:exploitpythonanacondapython.exe D:/exploit/python/workSapce/day2/string.py
 2 I teased at life as if it were a foolish game
 3 5
 4 --I teased at life as if it were a foolish game---
 5 False
 6 I teased at life as if it were a foolish game
 7 -1
 8 I teased at life as if it were a foolish game
 9 True
10 True
11 True
12 True
13 True
14 False
15 False
16 True
17 False
18 1*2*3*4
19 I teased at life as if it were a foolish game***********************************
20 I teased at life as if it were a foolish game
21 i teased at life as if it were a foolish game
22 I TEASED AT LIFE AS IF IT WERE A FOOLISH GAME
23 mark
24 
25 
26 maek
27 ---
28 m1rk
29 I teAsed At life as if it were a foolish game
30 -1
31 [‘I‘, ‘teased‘, ‘at‘, ‘life‘, ‘as‘, ‘if‘, ‘it‘, ‘were‘, ‘a‘, ‘foolish‘, ‘game‘]
32 [‘I teased at life as if it we‘, ‘e a foolish game‘]
33 [‘I teased at life as if it were a foolish game‘]
34 i TEASED AT LIFE AS IF IT WERE A FOOLISH GAME
35 I Teased At Life As If It Were A Foolish Game
36 I teased at life as if it were a foolish game
37 
38 Process finished with exit code 0

 

python中拷贝

 1 import copy#完全复制需要导入的包
 2 
 3 names = "ZhangYan Guyun DingXiaoPing"
 4 names = ["ZhangYan","Guyuan","LiSi",["nothing","no"],"nothing","WangWu"]
 5 
 6 print(names[0:-1:2])
 7 print(names[:])
 8 print(names[::2])
 9 for i in names:#切片
10     print(i)
11 
12 ‘‘‘# name2 = names.copy() #浅拷贝
13 name2 = copy.deepcopy(names)#深层次拷贝
14 print(name2)
15 print(names)
16 names[2] = "橡皮"
17 names[3][1] = "神马"
18 print(names)
19 print(name2)#第一层拷贝的数据，第二层拷贝的是内存地址
20 ‘‘‘
21 
22 
23 ‘‘‘names.append("nothing")#结尾插入
24 names.insert(2,"nomore")#任意位置插入
25 names[1] = "ZhangShan"#修改
26 print(names)
27 
28 # print(names.index("nothing"))#获得nothing的角标(第一次出现nothing的角标)
29 #
30 # print(names[names.index("nothing")])
31 #
32 # print(names.count("nothing"))#计数
33 #
34 # names.reverse()#反转
35 names.sort()#排序 ascii 码排序
36 print(names)
37 names2 = [1,2,3,4]
38 names.extend(names2)#合并
39 print(names,names2)
40 del names2#删除
41 print(names2)
42 # print(names[0],names[3])
43 # print(names[1:3])#取角标1和角标2
44 # print(names[2:])#取角标从2到结束
45 # print(names[-1])#取最后一位
46 # print(names[-2:])#取值后两位
47 # print(names[0:3])#零可以省略
48 
49 # names.remove("nothing")
50 #
51 # del names[2]
52 # print(names)
53 #
54 names.pop()#括号内可以写角标
55 print(names)
56 ‘‘‘

结果输出：
1 [‘ZhangYan‘, ‘LiSi‘, ‘nothing‘]
2 [‘ZhangYan‘, ‘Guyuan‘, ‘LiSi‘, [‘nothing‘, ‘no‘], ‘nothing‘, ‘WangWu‘]
3 [‘ZhangYan‘, ‘LiSi‘, ‘nothing‘]
4 ZhangYan
5 Guyuan
6 LiSi
7 [‘nothing‘, ‘no‘]
8 nothing
9 WangWu

python字典

 1 #key-value
 2 info = {
 3     ‘stu1001‘: "NWuTengLan",
 4     ‘stu1002‘: "LongZeLuoLa",
 5     ‘stu1003‘: "MaLiYa",
 6 
 7 }
 8 print(info)
 9 print(info["stu1002"])#存在字典中才可用这种方式查找，容易出错
10 info["stu1002"]="泷泽萝拉"
11 info["stu1005"]="泷泽萝拉"#存在就修改，不存在就创建
12 print(info)
13 print(info.get("stu1004"))#不出错的查找
14 
15 print(‘stu1002‘ in info)#判断是否在字典中
16 
17 #del
18 # del info["stu1005"]删除
19 # info.pop("stu1005")删除
20 # info.popitem()随缘删除
21 print(info)

运行结果：
1 {‘stu1003‘: ‘MaLiYa‘, ‘stu1002‘: ‘LongZeLuoLa‘, ‘stu1001‘: ‘NWuTengLan‘}
2 LongZeLuoLa
3 {‘stu1003‘: ‘MaLiYa‘, ‘stu1005‘: ‘泷泽萝拉‘, ‘stu1002‘: ‘泷泽萝拉‘, ‘stu1001‘: ‘NWuTengLan‘}
4 None
5 True
6 {‘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

 1 data = {
 2     ‘china‘:{
 3         "北京":{
 4             "朝阳区":["区政府","七天酒店"],
 5             "海淀区":["航空大学","地铁十号线"]
 6         },
 7         "河南":{
 8             "郑州市":["桂林路","新区"],
 9             "开封市":["民权","老城区"]
10         },
11 
12     },
13     ‘USA‘:{
14         "加州":{},
15         "佛罗里达州":{}
16     },
17 
18 }
19 
20 exitFlag = False
21 
22 while not exitFlag:
23     for i in data:
24         print(i)
25     choice = input("选择进入》》")
26     if choice in data:
27         for i2 in data[choice]:
28             print(i2)
29         choice2 = input("选择进入》》")
30         if choice2 in data[choice]:
31             for i3 in data[choice][choice2]:
32                 print(i3)
33             choice3 = input("选择进入》》")
34             if choice3 in data[choice][choice2]:
35                 for i4 in data[choice][choice2][choice3]:
36                     print(i4)
37                 choice4 = input("最后一层，按b返回》》")
38                 if choice4 == "b" or choice4 == "B":
39                     pass
40                 elif choice4 =="q" or choice4 == "Q":
41                     exitFlag = True#跳出循环
42             if choice3 == "b" or choice3 == "B":
43                 pass#返回
44             elif choice3 == "q" or choice3 == "Q":
45                 exitFlag = True
46         if choice2 == "b" or choice2 == "B":
47             break#跳出循环
48         elif choice2 =="q" or choice2 == "Q":
49             exitFlag = True