convert string to list python

1. String conversion to List' Hello world! '[' H ', ' e ', ' l ', ' l ', ' o ', ' ', ' W ', ' o ', ' r ', ' L ', ' d ', '! ']Where A is a string and a_list is a list2.List Convert to StringA_list = ['H','e','L','L','o',' ','W','o','R','L','D' , '! ']a="'. Join (A_list)//' He

': [20,18612512991,'Shandong'],'Lily': [25,18612532981,'Henan']}infos['Marry': [38,18612512981,'Beijing']]Delete:Infos = {'Marry': [18,18612512981,'Beijing'],'Amy': [20,18612512991,'Shandong'],'Lily': [25,18612532981,'Henan']} infos.pop ('Marry')#standard method of deletion delinfos['Marry']#use the Del method to deleteInfo.popitem ()#randomly delete a valueInquire:Infos = {'Marry': [18,18612512981,'Beijing'],'Amy': [20,18612512991,'Shandong'],'Lily': [25,18612532981,'Henan']} infos.get ('Maryy'

Lists and groupingsSequence Overview:A data structure is a collection of elements that are organized in some way together . The elements can be numbers, characters, or even other data structures.In Python, the most basic data structure is the sequence (sequence).Each element in the sequence is assigned an ordinal----the position of the element, also known as Index, subscript. The first index is 0, the second index is 1, and so on.Python contains 6 bui

number of digits of integers and decimals:>>> '%2d-%02d '% (3, 1)' 3-01 '>>> '%.2f '% 3.1415926' 3.14 '%s always works, it converts any data type to a string:>>> ' Age:%s. Gender:%s '% (True)' Age:25. Gender:true 'For Unicode strings, the usage is exactly the same, but it is best to ensure that the substituted string is also a Unicode string:>>> u ' Hi,%s '% u '

字符串右对齐 and fills a new string with a space to a specified lengthA.rsplit () #去掉右边空格或换行符A.rstrip () #去掉字符串右边的空格A.strip () #去掉字符串中的空格A.split () #字符串切片The A.splitlines () #按行分隔 Returns a list that contains rows as elements, and if NUM specifies that only num rows are sliced.A.startswith () #判断是不是以参数中内容开头A.swapcase () #对字符串的大小写字母进行转换A.title () #把字符串转成标题格式A.capitalize () #把字符串首字母变为大写A.endswith () #判断字符串是否以指定字符或子

Python's common operations on redis (list, string, and hash structure operations) and pythonredis All the discussions here are based on the python redis-py library. Installation and use: pip install redis Then obtain a redis client: redis_conn = redis.Redis(host=REDIS_HOST, port=REDIS_PORT, db=REDIS_DB) There are five basic types of redis. Including

#-*-coding:utf-8-*-Http://www.cnblogs.com/linjiqin/p/3674356.html#1, DictionariesDict = {' name ': ' Zara ', ' age ': 7, ' class ': ' First '}#字典转为字符串, return: Print type (str (dict)), str (DICT)#字典可以转为元组, return: (' age ', ' name ', ' class ')Print tuple (dict)#字典可以转为元组, return: (7, ' Zara ', ' first ')Print tuple (dict.values ())#字典转为列表, return: [' age ', ' name ', ' class ']Print List (dict)#字典转为列表Print Dict.values#2, tuplestup= (1, 2, 3, 4, 5)#元组转

= [' 123 ', ' 456 ', ' 123 ']Inuser = raw_input ("User name:")Inpass = Getpass.getpass ("Password:")#if whether the user exists (member operator):If Inuser in users:index = Users.index (Inuser)passwd = Passwds[index]if passwd = = Inpass:Print "%s landed successfully ..."% (Inuser)##1).找出用户名的索引值##2).取出对应用户名的密码##3).判断是否一致#if 密码正确: #passelse: print "密码不正确..."ElsePrint "%s does not exist, clear registration ..."% (Inuser)测试结果：因为导入getpass。在测试时必须用终端进行。![](http://i2.51cto.com/images/blog/201803/

The example in this article describes how the list elements in Python are converted to numbers. Share to everyone for your reference, as follows:There is a list of numeric characters:numbers = [' 1 ', ' 5 ', ' 10 ', ' 8 ']You want to convert each element to a number:numbers = [1, 5, 10, 8]Use a loop to solve:New_number

[' hel Lo ', ' World ', ' 3 ', ' 2 ', ' test2 ', ' test3 ', ' test2 ', ' test1 ', ' ling ' [' Hello ', ' 3 ', ' 2 ', ' test2 ', ' test3 ', ' test2 ', ' test1 ', ' Ling ']3. Set operationSet set is a list that is not duplicatedSadd (name,values)#给name对应的集合中添加元素R.sadd ("Set_name", "AA")R.sadd ("Set_name", "AA", "BB")Smembers (name)#获取name对应的集合的所有成员SCard (name)#获取name对应的集合中的元素个数R.scard ("Set_name")Sinter (keys, *args)# Get the set of multiple name corres

The example in this article is a useful technique for Python implementations that ignore case-by-column ordering of strings. Share to everyone for your reference. The specific analysis is as follows: Let's take a look at the following code: string = ' ' The stirng has many line in the fIle jb51 net ' list_of_string = String.Split () print list_of_string #将字符串分离开, put in the

Description of the Python string, list, and dictionaryString, list, dictionaryThe function of a string stores a piece of data information. For example, info = ' I love Beijing tian An door ', can be directly adjusted when the adjustment, flexible and convenient, print (info)

1 #-*-coding:utf-8-*-2 3 #1. Dictionaries4Dict = {'name':'Zara',' Age': 7,'class':' First'}5 6 #dictionary converted to string, return: : ' First '}7 Printtype (str (dict)), str (dict)8 9 #dictionaries can be converted to tuples, returning: (' age ', ' name ', ' class ')Ten Printtuple (dict) One #dictionaries can be converted to tuples, returning: (7, ' Zara ', ' first ') A Printtuple (Dict.values ()) - - #dictionary to

1 #-*-coding:utf-8-*-2 3 #1. Dictionaries4Dict = {'name':'Zara',' Age': 7,'class':' First'}5 6 #dictionary converted to string, return: : ' First '}7 Printtype (str (dict)), str (dict)8 9 #dictionaries can be converted to tuples, returning: (' age ', ' name ', ' class ')Ten Printtuple (dict) One #dictionaries can be converted to tuples, returning: (7, ' Zara ', ' first ') A Printtuple (Dict.values ()) - - #dictionary to

1.stringThere are four ways to define a string:' ' " " ''' ''' """ """Subscript and slice of a string :as : name = abcdeffrom the leftmost number is from 0 The subscript starts from the rightmost number from the -1 StartSlice Syntax: [ start : end : step ]Note: The selected interval is left closed right open type, that is, from the "start" bit, to the end of the first bit end of the bit ( does not include t

(dict2,10) print (DICT4) #字典 (Dictionary) get () function returns the value of the specified key if the value does not return a default value in the dictionary. dict5={' name ': ' Gyh ', ' Age ':25}print (dict5.get (' name ', ' haha ')) print (Dict5.get (' name ', ' haha ')) #字典 ( Dictionary) update () function updates the dictionary dict2 key/value pairs to dict dict={' Name ': ' Zara ', ' age ': 7}dict02= {' Sex ': ' Female '}dict.update (dict02) print ("value:%s" %dict) #以上实例输出结果为: #Value:

A solution to empty rows during conversion from a python file string to a list !, The file content is as follows: Alex 100000 Rain 80000 Egon 50000 Yuan 30000 # There is a blank line here! Now let's see how to handle it and convert it to a list! Salary_info = open ("sala

times-fold difference in performance. Remember that the string is very large, do not use s=s+a[i] this way, because the constant creation of memory space to add, not only the program is very card, greatly consumes the resources, but also very slow. ____________________________________________________________ In Python: Import time# First Way, appenda=[]t=time.time () for I in Range (1000000): a.a

python Converts the list continuous and non-contiguous elements to the specified stringBar User Questionshttp://tieba.baidu.com/p/3730249293a list of elements that are known to consist of a pure number (ordered by a small size), such asli=[1,2,3,4,5,7,8,15,20,21,22,23,24,28]write a function so that it returns the following stringstr= ' 1~5,7~8,15,20~24,28 'If the

-assignedBy deletingA.pop (' DD ') #因为字典是无序的, must pass keyA.popitem () #默认随机删除一个del a[' BB ']A.clear () #清空字典3. String methodFor i,t in Numerate (a): #可以同时循环下标和值", strip () #去空格和换行符", Split () #分割字符串", Upper () #变成大写", Lower () #变成小写", Count (' AA ') #出现的次数', '. Join () #把list变成字符串并且以, split". EndsWith #判断以什么什么结尾, return to True,f". StartsWith #判断以什么什么开头". IsDigit () #判断是不是纯数字4. File reading and writingOpe