When working with generators, AFAIK, there's currently no easy way to handle
the case of an empty generator (which can be useful if such case is an error).
Converting the generator to a, say, list, is not a solution if the generator is
intrinsically infinite.
I propose to have an "otherwise" clause in the "for" statement that runs only
if no items are to be processed; that is, to have the following code:
# where get_items() may be an infinite generator
for item in get_items():
SUITE1
otherwise:
SUITE2
be semantically equivalent to:
items_iter = iter(get_items())
try:
first_item = next(items_iter)
except StopIteration:
SUITE2
else:
for item in itertools.chain([first_item], items_iter):
SUITE1
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