circuitpython/tests/micropython/native_gen.py

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# test for native generators
# simple generator with yield and return
@micropython.native
def gen1(x):
yield x
yield x + 1
return x + 2
g = gen1(3)
print(next(g))
print(next(g))
try:
next(g)
except StopIteration as e:
print(e.args[0])
# using yield from
@micropython.native
def gen2(x):
yield from range(x)
print(list(gen2(3)))
# catching an exception from .throw()
@micropython.native
def gen3():
try:
yield 1
yield 2
except Exception as er:
print("caught", repr(er))
yield 3
g = gen3()
print(next(g))
print(g.throw(ValueError(42)))
# responding to .close()
@micropython.native
def gen4():
try:
yield 1
except:
print("raising GeneratorExit")
raise GeneratorExit
g = gen4()
print(next(g))
print(g.close())