The difference between Python append, Extend, and insert _python

Recently, when I learned the Python language and saw adding more data to the list by append (), Extend (), the Insert () method was passed around.

Append and extend all need only one parameter and are automatically added to the end of the array, and if you need to add more than one, the array can be nested, but append is the nested array as an object,

Extend is to add nested array contents as multiple objects to the original array

As a basis for programming 0 small white, feel the need to comb it again:

The 1.append () method refers to adding a data item at the end of the list.

For example, add the "Gavin" item at the end of the students list.

>>> students = [' Cleese ', ' Palin ', ' Jones ', ' Idle ']
>>> students.append (' Gavin ')
>>& Gt Print (students)
[' Cleese ', ' Palin ', ' Jones ', ' Idle ', ' Gavin ']

The 2.extend () method refers to adding a data collection at the end of the list.

For example, on the basis of Example 1, the end of the students list continues to add "Kavin" and "Jack" and "Chapman" three items.

>>> students = [' Cleese ', ' Palin ', ' Jones ', ' Idle ']
>>> students.append (' Gavin ')
>>& Gt Print (students)
[' Cleese ', ' Palin ', ' Jones ', ' Idle ', ' Gavin ']
>>> students.extend ([' Kavin ', ' Jack ', ' Chapman ']
>>> print (students)
[' Cleese ', ' Palin ', ' Jones ', ' Idle ', ' Gavin ', ' Kavin ', ' Jack ', ' Chapman ']

The 3.insert () method refers to adding a data item before a specific location.

For example, add "Gilliam" before "Palin" in the students original list.

>>> students = [' Cleese ', ' Palin ', ' Jones ', ' Idle ']
>>> students.insert (1, ' Gilliam ')
> >> print (students)
[' Cleese ', ' Gilliam ', ' Palin ', ' Jones ', ' Idle '].

Because the data items are stacked from the bottom up, the first data number in the stack is 0, the second data number is 1, so it is Students.insert (1, ' Gillam ').

Thank you for reading, I hope to help you, thank you for your support for this site!