circuitpython/tests/basics/gen_yield_from_stopped.py
Damien George bb00125aaa py: Support single argument to optimised MP_OBJ_STOP_ITERATION.
The MP_OBJ_STOP_ITERATION optimisation is a shortcut for creating a
StopIteration() exception object, and means that heap memory does not need
to be allocated for the exception (in cases where it can be used).  This
commit allows this optimised object to take an optional argument (before,
it could only have no argument).

The commit also adds some new tests to cover corner cases with
StopIteration and generators that previously did not work.

Signed-off-by: Damien George <damien@micropython.org>
2021-07-15 00:12:41 +10:00

31 lines
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Python

# Yielding from stopped generator is ok and results in None
def gen():
return 1
# This yield is just to make this a generator
yield
f = gen()
def run():
print((yield from f))
print((yield from f))
print((yield from f))
try:
next(run())
except StopIteration:
print("StopIteration")
# Where "f" is a native generator
def run():
print((yield from f))
f = zip()
try:
next(run())
except StopIteration:
print("StopIteration")