Is pickling of generator still supported in 3.3?

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I was able to pickle a generator in the stackless python 2.7 version, the
code I use is:

def process():
yield 0
yield 1

gen = process()
print(gen.send(None))
import pickle
print(pickle.dumps(gen))

But in the stackless python 3.3 version (which I downloaded source code and
compiled in a Ubuntu 12.04 amd64 box), the code can not run. The error
message read was:

0
Traceback (most recent call last):
  File "test.py", line 8, in <module>
    print(pickle.dumps(gen))
_pickle.PicklingError: Can't pickle <class 'generator'>: attribute lookup
builtins.generator failed

Is this a feature? Or deserve a bug fix?

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<div dir=3D"ltr">I was able to pickle a generator in the stackless python 2=
.7 version, the code I use is:<div><br></div><div><div>def process():</div>=
<div><span class=3D"" style=3D"white-space:pre">	</span>yield 0</div><div><=
span class=3D"" style=3D"white-space:pre">	</span>yield 1</div><div><br></d=
iv><div>gen =3D process()</div><div>print(gen.send(None))</div><div>import =
pickle</div><div>print(pickle.dumps(gen))</div></div><div><br></div><div>Bu=
t in the stackless python 3.3 version (which I downloaded source code and c=
ompiled in a Ubuntu 12.04 amd64 box), the code can not run. The error messa=
ge read was:</div><div><br></div><div><div>0</div><div>Traceback (most rece=
nt call last):</div><div>=C2=A0 File &quot;test.py&quot;, line 8, in &lt;mo=
dule&gt;</div><div>=C2=A0 =C2=A0 print(pickle.dumps(gen))</div><div>_pickle=
.PicklingError: Can&#39;t pickle &lt;class &#39;generator&#39;&gt;: attribu=
te lookup builtins.generator failed</div></div><div><br></div><div>Is this =
a feature? Or deserve a bug fix?</div></div>

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