Hi,
I am wondering what would be the best way to return an iterator that
has zero items.
I just noticed the following two are different:
def f():
pass
def g():
if 0: yield 0
pass
for x in f(): print x
Traceback (most recent call last):
File "<string>", line 1, in <fragment>
TypeError: 'NoneType' object is not iterable
for x in g(): print x
#loop exits without any errors
Now the question here is this:
def h():
if condition=true:
#I would like to return an itereator with zero length
else:
for ...: yield x
In other words, when certain condition is met, I want to yield
nothing. How to do?
Thanks,
gz
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