5vht-and-with-sequences.md

+ and * with Sequences

#python #programming #language #efficiency

• It is the operation _add_ and _mul_.
• a += b is the operation _iadd_. When it is not implemented, the fallback is the _add_
• _iadd_ is the list.extend(). Is the same for bytearray and array.array.
• For immutable objects, the _iadd_ is similar to the _add_.

Warning

PERFORMANCE: Append on imutable objects are inefficient

Warning

BUG: Does not put mutable objects on immutable ones.