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python中字符串方法
我要评论 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\n'.lstrip())#去左边的特殊符
26 print('\nmaek\n'.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:\exploit\python\anaconda\python.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
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