python数组列表、字典、拷贝、字符串
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\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
