Python3 Basics-Lists and dictionaries

List

name = ['KZX','666','None','Truth']#InterceptPrint(Name[1:3])#Remove the element labeled 1 to 3 (containing the element with subscript 1, but not 3)
[' 666 ', ' none ']
Print(Name[1:-1])#also remove the element labeled 1 to-1 (that is, subscript 3) (including the element with subscript 1, but not 1)[' 666 ', ' none ']
Print(Name[0:3])#Remove the element labeled 0 to 3 (containing the element with subscript 1, but not 3)
[' Kzx ', ' 666 ', ' none ']
Print(Name[:3])#also remove the elements from 0 to 3
[' Kzx ', ' 666 ', ' none ']
Print(name[1:])#take all elements except subscript 0.[' 666 ', ' none ', ' truth ']Print(Name[1:4])#when the current label is larger than the maximum subscript for the list, it is equivalent to Name[start,max]                   #(Start is the subscript to start with, Max is the largest subscript of the list)[' 666 ', ' none ', ' truth ']

#AddName.append ("New")#add from LastName.insert (2,"Insert")Print(name) [' Kzx ', ' 666 ', ' Insert ', ' none ', ' Truth ', ' new ']
#ModifyNAME[2] =" Change"Print(name) [' Kzx ', ' 666 ', ' change ', ' none ', ' Truth ', ' new ']
#DeletedelNAME[2]#Delete the element labeled 2 in the listName.remove ("KZX")#Specify Delete elementPrint(name) [' 666 ', ' none ', ' Truth ', ' new ']name.pop ()#Delete the last value of a list#Merge 2 listsb = [1, 2, 3]name.extend (b)Print(name) [' 666 ', ' none ', ' Truth ', 1, 2, 3]
#CopyCopy_name =name.copy ()Print(copy_name) [' 666 ', ' none ', ' Truth ', 1, 2, 3]
#number of Statistics element occurrencesnames = ['KKK','RR','KKK','e','RR', 1, 2, 3]Print(Names.count ("KKK")) 2
#Sortc = [1, 2, 3]c.sort ()Print(c)#Python3 Different data types cannot be sorted together[1, 2, 3]
C.reverse ()Print(c)#reversal
[3, 2, 1]

# Get subscript Print (Names.index ("KKK"))  # returns only the first subscript found 0

Dictionary

DIC = {' name ': ' A ', ' age ': +, ' gender ': ' Middle '}# add dic[' habbit '] = ' a_lot ' Print (DIC) {' name ': ' A ', ' gender ': ' Middle ', '  Habbit ': ' A_lot ', ' age ': 21}# modify dic[' habbit '] = ' none ' Print (DIC) {' name ': ' A ', ' gender ': ' Middle ', ' habbit ': ' None ', ' age ': 21}# Delete dic.pop (' habbit ')  # or use (Del dic[' Habbit ']) print (DIC) {' name ': ' A ', ' gender ': ' Middle ', ' age ': 21}# find Print ( "Age" in dic) Trueprint (Dic.get ("Age")  # or use (dic[' age ')) 21# Othersprint (Dic.values ()) print (Dic.keys ()) dict_ VALUES ([' A ', ' middle ', +]) dict_keys ([' Name ', ' gender ', ' age ']) # traversal # method 1for key in dic:    print (key, Dic[key]) # method 2for K , V in Dic.items ():  # will first turn the dict into a list, the data in the big time Mo with    print (k, v)

Weak slag I'll introduce you to the list and dictionary of Python3, and a little mention of tuples

About tuples

NAMES  =  (" Al ", " U ", " C ")

Tuples are actually similar to the list, but also to save a group of numbers, it is not once created, it can not be modified, so it is called a read-only list

[1, 2, 3] [3, 2, 1]

Python3 Basics-Lists and dictionaries