Yield multiple values

Question

Can\'t we yield more than one value in the python generator functions?

Example,

In [677]: def gen():
   .....:     for i in range(5):
   .....:         y         


        

Answer 1

Because gen() returns a generator (a single item - so it can't be unpacked as two), it needs to be advanced first to get the values...

g = gen()
a, b = next(g)

It works with list because that implicitly consumes the generator.

Can we further make this a generator? Something like this:

g = gen();
def yield_g():
    yield g.next();
    k1,k2 = yield_g();

and therefore list(k1) would give [0,1,2,3,4] and list(k2) would give [1,2,3,4,5].

Keep your existing generator, and use izip (or zip):

from itertools import izip
k1, k2 = izip(*gen())