The difference between append, extend and insert

Recently, in the self-learning Python language, it was append (), extend (), and the Insert () method to see that more data was added to the list.

As the basis of 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 ')
>>> Print (students)
[' Cleese ', ' Palin ', ' Jones ', ' Idle ', ' Gavin ']

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

For example: in Example 1, the end of the students list continues to add three entries for "Kavin" and "Jack" and "Chapman".

>>> students = [' Cleese ', ' Palin ', ' Jones ', ' Idle ']
>>> students.append (' Gavin ')
>>> 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 the addition of a data item in front of 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 '].

Since data items are stacked from bottom to top, the first data in the stack is numbered 0 and the second data is 1, so it is Students.insert (1, ' Gillam ').

The difference between append, extend and insert