1.li.append (5) added!
li = [12,54,45,45 ] li.append ( 5 ) print (li)
[12,54,45,45，5]
2.li.clear() Clear!
li = [12,54,45,45 ] li.clear() print (li)
[]
3.v = li.copy() Shallow copy!
li = [12,54,45,45 ] v = li.copy () print (v)
4.v = li.count(22) counts the number of occurrences of the element
li = [12,54,45,45 ] v = li.count (22 ) print (v)
5.li.extend([9898,"incredible"]) executes the for loop, adding the things in the parentheses separately instead of appending them as a whole to the list
li = [12,54,45,45 ] li.extend([ 9898, " Fantastic " ]) print (li)
[12, 54, 45, 45, 9898, 'Fantastic']
5.v = li.index(12) Get the index position, start looking from the left, you can set the search range
li = [12,54,45,45 ] v = li.index (12 ) print (v)
0
6.li.insert(0,99) inserts an element at the specified position
li = [12,54,45,45 ] li.insert(0,99) print(li)
[99, 12, 54, 45, 45]
7.li.pop() v =li.pop() deletes the last value by default, you can delete a certain value (delete by index, for example, the parameter is 1 to delete the second element), and you can use assignment to get the deleted value
li = [12,54,45,45 ] v = li.pop () print (li)
[12, 54, 45]
8.li.remove(54) delete the value specified in the list, and start from the left
li = [12,54,45,45 ] li.remove ( 54 ) print (li)
[12, 45, 45]
9.li.reverse() reverses the current list
li = [12,54,45,45 ] li.reverse() print (s)
[45, 45, 54, 12]
10.li.sort() li.sort(reverse=Ture) sort, the first one is from small to big, the second is from big to small
li = [12,45,78,54 ] li.sort () print (li)
[12, 45, 54, 78]