Python @converter decorator

converter.py

import functools


def converter(convert):
    """Decorator for making decorators converting function return values.
    
    Take a single argument function and make it into a decorator 
    converting return values of other functions.
    """
    @functools.wraps(convert)
    def converter(f):
        @functools.wraps(f)
        def converted(*args, **kwargs):
            return convert(f(*args, **kwargs))
        return converted
    return converter

# list is already defined, so as_list is best defined as
as_list1 = converter(list)

# test as_list1
@as_list1
def gen1():
    for i in range(10):
        yield i

assert gen1() == list(range(10))

# or have one more indirection just to test the decorator as decorator
@converter
def as_list2(items):
    return list(items)

# test as_list2
@as_list2
def gen2():
    for i in range(10):
        yield i

assert gen2() == list(range(10))