all Python 3Lists (list)function

list.extend

adding

Append all items from an iterable to the end of the list (in place).

Syntax

lst.extend(iterable)

extend iterates over its argument, so a string is split into individual characters — use append if you want the whole string as one element. It works in place and returns None; lst += iterable does exactly the same, whereas lst = lst + other demands a list and builds a new object.

Examples

lst = [1, 2]
lst.extend([3, 4])
print(lst)          # → [1, 2, 3, 4]
lst.extend('ab')
print(lst)          # → [1, 2, 3, 4, 'a', 'b']

See also

Common errors

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