Difference between python append, extend and insert, pythonappend

Difference between python append, extend and insert, pythonappend

Recently, I learned how to add more data to the list using the append (), extend (), and insert () methods.

Append and extend both require only one parameter and are automatically added to the end of the array. If multiple parameters need to be added, Arrays can be nested. However, append uses the nested array as an object,

Extend is to add the nested array content as multiple objects to the original array.

I think it is necessary for me to repeat it as a basic programmer:

1. The append () method adds a data item to 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‘]

2. The extend () method adds a data set at the end of the list.

For example, based on Example 1, "Kavin" and "Jack" and "Chapman" are added at the end of the students list.

>>> 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‘]

 

3. The insert () method adds a data item before a specific position.

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

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

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

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