How to yield results from a nested generator function?

function, generator, nested, python, yield

Solution

Can't believe I missed this; The answer is to simply return the generator function with suitable arguments applied:

import time

def GeneratorFunction(max_val):
    for i in range(0,max_val):
        time.sleep(1)
        yield "String %d"%i

def SmallGenerator():
    return GeneratorFunction(3) # <-- note the use of return instead of yield

for s in SmallGenerator():
    print s

Problem

I have a function which yields results as it downloads them. For the purposes of this question, lets say I yield a sting once every second but I want a convenience function to wrap my generator: ``` import time def GeneratorFunction(max_val): for i in range(0,5): time.sleep(1) yield "String %d"%i def SmallGenerator(): yield GeneratorFunction(3) for s in SmallGenerator(): print s ``` ...why doesn't that just print the 5 strings I'm expecting? Instead it appears to return the generator functio: ``` <generator object GeneratorFunction at 0x020649B8> ``` How can I get this to yield the strings as a normal generator function would?

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