Python Learning (iv)

List of additions and deletions to search and change

1. Increase

A, append (): Add at the end of the list

B, insert (INDEX,SELF): Inserts self at the specified index, moves the original position data back

C, Extend (self,iterable): Inserts the iteration of self into the end of the list, and if Self is a list, inserts the list element to the end

2. Delete

A, Pop (index): Remove by index value removes the last one by default

B, remove (self): Remove by value, remove self from list, if not found, error

C, Clear (): Empty list

D, del: Default Delete list, can be deleted by index individual, can also slice delete

3. Enquiry

by looping

4. Change

A, by index

b, by slice, the changed string will be iterated

C, by list, changes the list element in

Nesting of lists

Java-like arrays

A new list is created after the changes are made in the nested, and the new list needs to be assigned to the new list

Ganso

1, read-only list, can be circular query, can be sliced

2, the offspring can not be changed, the sun will change

Conversion of strings and lists

Join list to string, number cannot appear in list, list

Split string goto List

Python Learning (iv)