List of built-in methods in python

#!/usr/local/bin/python3
# -*- coding:utf-8 -*-

names=['zhangyu','mahongyan','zhangguobin','shachunhua']
#-----increase-----
'''names.append('zhangzhongjian') #Insert an element at the end of the list
names.insert(1,'aaa') #Insert an element ''' at the specified position in the list

#-----delete-----
'''names.remove('zhangyu') #Remove the element named 'zhangyu' in the list
del names[1] #Delete the element at the specified position in the list
names.pop() #Delete the last element in the list by default
names.pop(0) #Delete the element ''' at the specified position in the list

#-----change-----
#names[2]='bbb'

#-----check-----
'''print(names[0],names[2])
print(names[0:3]) #Ignore the head and ignore the tail/slicing
print(names[-1]) #take the last one
print(names[-2:]) #Take the last two
print(names[:3]) #Take the first two '''

#-----Find-----
'''print(names.index('zhangyu')) #Find the subscript (position) of 'zhangyu' in the list
print(names[names.index('zhangyu')]) #Retrieve the corresponding value in the list according to the subscript'''

#-----statistics-----
#print(names.count('zhangyu')) #Count the number of times 'zhangyu' appears in the list

#-----Clear-----
#names.clear() #Clear the elements in the list

#-----Reverse-----
#names.reverse() #Reverse the entire list

#-----Sort-----
#names.sort() # Sort the list, the priority is: special symbols --> numbers --> uppercase letters --> lowercase letters

#-----Merge list-----
'''names2=[1,2,3,4] #Merge names2 into names
names.extend(names2)
del names2 #delete names2
print(names)'''

#-----copy-----
'''names1=['zhangyu','mahongyan',['aaa','bbb'],'zhangguobin','shachunhua']
names2=names1.copy()
print(names2,names1)
names1[0]='Zhang Yu'
names1[2][0]='abc'
print(names2,names1) #It can be seen that when the elements in names1 change, names2 does not completely copy names1 (shallow copy)
                        #So how to perform deep copy? -->Introduce copy module
import copy
names1=['zhangyu','mahongyan',['aaa','bbb'],'zhangguobin','shachunhua']
names2=copy.deepcopy(names1)    #深copy
print(names2,names1)
names1[0]='Zhang Yu'
names1[2][0]='abc'
print(names2,names1) #At this time, no matter how the elements in names1 change, the elements in names2 are still the elements in the original names1'''

#-----cycle-----
'''for x in names:
    print(x)'''

#-----step slice-----
#print(names[0:-1:2])