Extend () and append () differences

Both extend () and append () can be used to add.

Cases:

A = [1,2,3,4,5,6]

b = [7,8,9,10]

c = {' AA ': 123, ' BB ': 456, ' CC ': 789}

1. A.append (b)

Operation Result:

>>>[1,2,3,4,5,6,[7,8,9,10]]

2. A.extend (b)

Operation Result:

>>>[1,2,3,4,5,6,7,8,9,10]

3. A.extend (c)

>>>[1,2,3,4,5,6, ' AA ', ' BB ', ' CC '

A.append (c)

>>>[1,2,3,4,5,6,{' AA ': 123, ' BB ': 456, ' CC ': 789}]

By running the results above you can see that append () is looking at B as a whole and adding it to the list, while extend () takes each element of the list and adds it to table A.

When you add a dictionary, the dictionary key is added with extend (), and append () adds the entire dictionary C

Thank you for reading.

This article refers to:

Https://www.cnblogs.com/subic/p/6553187.html

Extend () and append () differences