how to append one list to another code example

Example 1: python add all values of another list

a = [1, 2, 3]
b = [4, 5, 6]
a += b
# another way: a.extend(b)

Example 2: python how to move multiple values from one list to another at once

a = [1, 2, 3, 4, 5]
b = [6, 7, 8, 9, 10]

b = a[2:] + b
a = a[:2]

Now the contents of a and b respectively are a = [1, 2] and b = [3, 4,
5, 6, 7, 8, 9, 10].