generator function in python

Question

>>> g = (2**x for x in range(100))
>>> next(g)
1
>>> next(g)
2
>>> next(g)
4
>>> next(g)
8
>>> next(g)
16

I had came across this example of generator function.How this can be a generator function,it doesn't have yield keyword. How is this functioning ?

Answer 1

It's a generator expression. Basically a list comprehension with () instead of []. It doesn't need a yield statement just like a lambda doesn't need a "return"