Modern Python Standard Library Cookbook

How to do it...

We can easily adapt operator.mul to be a unary function and then pass it to map to apply it to the whole list:

>>> import functools, operator
>>>
>>> values = range(10)
>>> mul3 = functools.partial(operator.mul, 3)
>>> list(map(mul3, values))
[0, 3, 6, 9, 12, 15, 18, 21, 24, 27]

As you can see, operator.mul was called with 3 and the item as its arguments, and thus returned item*3.