python delete item from list

Python listThe list is the most frequently used data type in Python.A list can accomplish the data structure implementation of most collection classes. It supports characters, numbers, and strings that can even contain lists (that is, nesting).The list is identified by [], which is the most common type of composite dat

A list of python basics and python Basics List Function The list function converts other types of sequences to a list, as shown in figure >>> List ("hello world ")['H', 'E', 'l', 'l'

)#results: [' A ', 2, ' C ', ' A ', 2, ' C ', ' A ', 2, ' C ']In similar to string in use#In #判断元素是否存在列表中ls = ['a','b','C','D']Print('C' inchls#TruePrint('x' inchls#FalseComparison of lists ( prerequisites: Must be of the same type to be compared, otherwise error )#Major premise: only the same type directly compare the size, for the index value of the direct comparison is based on the location one by one corresponding to the comparisonLS1 = ['a','b','C']LS2= ['x','y','Z']LS3= ['A','Z']Print(LS1

Lists List[Vale,...] Can be added to any type of data, and can be nested, indefinite lengthStudent = ["Beimenchuixue", "Mayun", "Mahuiteng", "naichadong"]product = ["blog", "TaoBao", "Weichat", "JD"]score = ["Beim Enchuixue ", [90, 80, 66, 77, 99]List Access1. Specify insert. insert2. Insert at the end. Append3. Value deletion. Remove4. Know the index to delete a

buy:%s"%shopping_car[i]) #打印购物车中的东西Print ("balance Money Is:%s"%salary) #打印余额Print ("--------------------------------")ElsePrint ("!!!! You are not having so money!!!! ") #钱不够, can't buy!Print ("you balance Money Is:%s"%salary) #提示有多少钱!If Len (shopping_car) > 0: #判断是否买了东西, buy it and print it without buying it.Print (shopping_car)Print ("--------------------------------")#break #没钱买了还扯蛋!!!ElsePrint ("we are not having this good,please choice Again!") #输入的数字大于序列号, Print without this productelif

inserted element, so A.insert (0, X) inserts a value in the header of the list, A.insert (Len (a), x) equals A.append (x). List.remove (x) removes the first item with a value of x from the list. If no such item is an error. List.pop ([i]) deletes the item at the giv

In Python, lists and tuples are data structures: sequences, each element in the sequence is assigned an ordinal, the position of the element, the position of the first element is 0, and so on. Sequence is the most basic data structure, lists and tuples have a certain difference between them, that is, the list can be modified, and tuples cannot be modified! If you want to add an element, it is best to use a

because the Python interpreter does it by itself whenever you don't use the value anymore)To give an example, a data (such as a list in an example) is a box, and we assign it to a variable x, which is like putting a label x on the box and then pasting y to represent the data, but using Del to delete the variable x is like tearing the label labeled X, leaving the

, and the element value is stored in this place. This action shifts each element in the list to the right one position[[Email protected] List]# cat modification.py message = [' A ', ' B ', ' C ']message.insert (0, ' cat ') print (message) [email Protected] List]# python modification.py[' cat ', ' A ', ' B ', ' C ']1.2.