List of Python basic types

List common operations and Methods list classes, lists
Li = [1, +, 9, "age", [P], ["+]]]," EDD ", True] objects created through the list class, Li
List class
An object of the list class Li = [11, 22, 33, 22, 44]

1#Conversion2# string Conversion List Li = List ("ASDFASDFASDF"), internal use for loop3s ="POUASKDFAUSPDFIAJSDKFJ"4New_li =list (s)5 Print(New_li)6 7#the list is converted into a string,8# You need to write your for loop one by one processing: both numeric and string 2018-07-239Li = [11,22,33,"123","Alex"]TenR = Str (LI)'[11,22,33, "123", "Alex"]' One Print(R) As ="" -  forIinchLi: -s = s +Str (i) the Print(s) -#directly using the string join method: The elements in the list are only strings -Li = ["123","Alex"] -v ="". Join (LI) + Print(v) -  +  

 1. Append: The original value was last appended
Object. Method (..) Li Object Call append method

1  Li.append (5)2  li.append ("Alex")3   li.append ([1234,2323])4  print(LI)

2 clear: Clear list

12print(LI)

3 copy: Copy, shallow copy

1  v = li.copy ()2  print(v)

4. Count the number of occurrences of an element

1  v = li.count (2)  print(v)

5. Expand the original list, parameters: can iterate objects

1Li = [11, 22, 33, 22, 44]2Li.append ([9898,"incredibly"])3[11, 22, 33, 22, 44, [9898,'incredibly']]4 5Li.extend ([9898,"incredibly"])6 7   forIinch[9898,"incredibly"]:8 li.append (i)9[11, 22, 33, 22, 44, 9898,'incredibly']Ten  OneLi.extend ("incredibly") A  Print(LI)

6. Get the current value index position by value (left priority)

1  Li = [one, one,2,  v= li.index]3  print(v)

7. Inserting an element at the specified index location

1  Li = [one, one, one,2  li.insert (0,99)3  print( Li

8. Delete a value (1. Specify an index; 2. The last one by default) and get the deleted value

1  Li = [one, a,2  v = li.pop ()3  print(LI)4   Print(v)56li = [one, A, a, a,  a]7   v = li.pop (1)8  print(LI)9   Print(v)

9. Delete the specified value from the list, the left priority

1  Li = [one, one, 2, Li.remove]  3  print(LI)

10 Flipping the current list

1  Li = [one, one, one,2  li.reverse ()3  print(LI)

11 Sorting of Lists

1  Li = [11,44, p, p]2  li.sort ()3  li.sort (reverse=True)4   print(LI)56  

List of Python basic types