def infinite_sequence(num=0):
    print("Called")
    yield
    while num < 20:
        print("Yielding")
        yield num
        if num == 15:
            raise ValueError()
        num += 1
    print("All out of yields?")

print('function infinite_sequence' in str(infinite_sequence))
print('generator object infinite_sequence' in str(infinite_sequence()))

def foo(o=None):
    try:
        o = infinite_sequence()
        for i in o:
            print(i)
    except:
        pass
    print('===')
    print(o.gi_running)
    print('---')
    # It's empty now.
    for i in o:
        print(i)

foo()

# We should also be able to make generator methods

class Foo():
    def __init__(self):
        self.bar = "baz"
    def generatorMethod(self):
        for c in self.bar:
            print('yielding',c)
            yield c

let f = Foo()
for entry in f.generatorMethod():
    print('got',entry)
for entry in f.generatorMethod():
    print('got',entry)