Reading data from a generator using yield from

def reader():

    """A generator that fakes a read from a file, socket, etc."""

    for i in range(4):

        yield '<< %s' % i

def reader_wrapper(g):

    # Manually iterate over data produced by reader

    for v in g:

        yield v

wrap = reader_wrapper(reader())

for i in wrap:

    print(i)

# Result

<< 0

<< 1

<< 2

<< 3

Instead of manually iterating over reader(), we can just yield from it.

def reader_wrapper(g):

    yield from g

That works, and we eliminated one line of code. And probably the intent is a little bit clearer (or not). But nothing life changing.