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<p class="MsoNormal">“I run this with the default settings in wing IDE. If i run it in IDLE, there is no exception.”<o:p></o:p></p>
<p class="MsoNormal">That sounds like the problem.<o:p></o:p></p>
<p class="MsoNormal">Boy, do I hate how hard it is to debug pickling problems. for “pickle” we really should have a flag that prints out the hierarchy as it is pickling.<o:p></o:p></p>
<p class="MsoNormal">Maybe someone has already done that?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Anyway, I’ll install Wingware and see if I can reproduce it there. I’m sure wingware is messing with pickling in some unexpected way.<o:p></o:p></p>
<p class="MsoNormal">(I’m unfamiliar with wingware, btw. If you feel up to it, try putting debugging code inside pickle.py to dump out what it is doing, that might be faster. I would guess that it is doing something with the copy_reg module and this is
messing with our function pickling.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">K<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> stackless-bounces@stackless.com [mailto:stackless-bounces@stackless.com]
<b>On Behalf Of </b>lars van Gemerden<br>
<b>Sent:</b> 10. október 2013 15:24<br>
<b>To:</b> The Stackless Python Mailing List<br>
<b>Subject:</b> Re: [Stackless] Fwd: deepcopying (pickling) channels<o:p></o:p></span></p>
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</div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">the callstack is:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">pickle.PicklingError: Can't pickle <type 'function'>: it's not found as __builtin__.function<o:p></o:p></p>
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<p class="MsoNormal">File "d:\Documents\Code\python\floware\toolshed\tests\stackless_test.py", line 34, in <module><o:p></o:p></p>
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<p class="MsoNormal"> print pickle.dumps(t) #ERROR<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 1411, in dumps<o:p></o:p></p>
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<p class="MsoNormal"> Pickler(file, protocol).dump(obj)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 231, in dump<o:p></o:p></p>
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<p class="MsoNormal"> self.save(obj)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 338, in save<o:p></o:p></p>
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<p class="MsoNormal"> self.save_reduce(obj=obj, *rv)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 426, in save_reduce<o:p></o:p></p>
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<p class="MsoNormal"> save(state)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
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<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 661, in save_dict<o:p></o:p></p>
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<p class="MsoNormal"> self._batch_setitems(obj.iteritems())<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 675, in _batch_setitems<o:p></o:p></p>
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<p class="MsoNormal"> save(v)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 338, in save<o:p></o:p></p>
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<p class="MsoNormal"> self.save_reduce(obj=obj, *rv)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 426, in save_reduce<o:p></o:p></p>
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<p class="MsoNormal"> save(state)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
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<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 569, in save_tuple<o:p></o:p></p>
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<p class="MsoNormal"> save(element)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
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<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 607, in save_list<o:p></o:p></p>
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<p class="MsoNormal"> self._batch_appends(iter(obj))<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 622, in _batch_appends<o:p></o:p></p>
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<p class="MsoNormal"> save(x)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 338, in save<o:p></o:p></p>
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<p class="MsoNormal"> self.save_reduce(obj=obj, *rv)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 426, in save_reduce<o:p></o:p></p>
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<p class="MsoNormal"> save(state)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
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<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 569, in save_tuple<o:p></o:p></p>
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<p class="MsoNormal"> save(element)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
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<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 607, in save_list<o:p></o:p></p>
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<p class="MsoNormal"> self._batch_appends(iter(obj))<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 622, in _batch_appends<o:p></o:p></p>
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<p class="MsoNormal"> save(x)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 338, in save<o:p></o:p></p>
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<p class="MsoNormal"> self.save_reduce(obj=obj, *rv)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 426, in save_reduce<o:p></o:p></p>
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<p class="MsoNormal"> save(state)<o:p></o:p></p>
</div>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 569, in save_tuple<o:p></o:p></p>
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<p class="MsoNormal"> save(element)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
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<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 661, in save_dict<o:p></o:p></p>
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<p class="MsoNormal"> self._batch_setitems(obj.iteritems())<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 675, in _batch_setitems<o:p></o:p></p>
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<p class="MsoNormal"> save(v) <== THIS LINE<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
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<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 802, in save_function<o:p></o:p></p>
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<p class="MsoNormal"> return self.save_reduce(obj=obj, *rv)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 426, in save_reduce<o:p></o:p></p>
</div>
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<p class="MsoNormal"> save(state)<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
</div>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 569, in save_tuple<o:p></o:p></p>
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<p class="MsoNormal"> save(element)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
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<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
</div>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 661, in save_dict<o:p></o:p></p>
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<p class="MsoNormal"> self._batch_setitems(obj.iteritems())<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 675, in _batch_setitems<o:p></o:p></p>
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<p class="MsoNormal"> save(v)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 338, in save<o:p></o:p></p>
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<p class="MsoNormal"> self.save_reduce(obj=obj, *rv)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 426, in save_reduce<o:p></o:p></p>
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<p class="MsoNormal"> save(state)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
</div>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 661, in save_dict<o:p></o:p></p>
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<p class="MsoNormal"> self._batch_setitems(obj.iteritems())<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 675, in _batch_setitems<o:p></o:p></p>
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<p class="MsoNormal"> save(v)<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 293, in save<o:p></o:p></p>
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<div>
<p class="MsoNormal"> f(self, obj) # Call unbound method with explicit self<o:p></o:p></p>
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<p class="MsoNormal">File "C:\Python27\lib\pickle.py", line 760, in save_global<o:p></o:p></p>
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<p class="MsoNormal"> (obj, module, name))<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Probably not that usefull without values ... in THIS LINE above, v is module C:\python27\lib\new.pyc.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I don't think there is a framework in place that would influence this script, the imports (pickle, stackless) are unaltered.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I run this with the default settings in wing IDE. If i run it in IDLE, there is no exception.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">On Thu, Oct 10, 2013 at 3:22 PM, Kristján Valur Jónsson <<a href="mailto:kristjan@ccpgames.com" target="_blank">kristjan@ccpgames.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The error is weird. It seems to be trying to pickle the “function” type. It shouldn’t try doing
that.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Now, I know that pickling channels with tasklets on them works. This is what stackless does.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I tried saving your code into a module and just running it from the command line.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I wonder if there is some copy_reg magic that is interfering with the code. How are you running
it? Is this when running the code as a module, or when typing it in from the console?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Are you trying this in a stand-alone environment or in some application framework?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Finally, can I see the full traceback for the pickle exception. If you are using pickle (and not
cPickle) a traceback can help us find out why it is failing.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">K</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:stackless-bounces@stackless.com" target="_blank">stackless-bounces@stackless.com</a> [mailto:<a href="mailto:stackless-bounces@stackless.com" target="_blank">stackless-bounces@stackless.com</a>]
<b>On Behalf Of </b>lars van Gemerden<br>
<b>Sent:</b> 9. október 2013 12:48</span><o:p></o:p></p>
<div>
<p class="MsoNormal"><br>
<b>To:</b> The Stackless Python Mailing List<o:p></o:p></p>
</div>
<p class="MsoNormal"><b>Subject:</b> Re: [Stackless] Fwd: deepcopying (pickling) channels<o:p></o:p></p>
</div>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi Kristjan,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">the version i am using is: python 2.7.5 Stackless 3.1b3 (from binary).<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I think the stackless mailsystem was a little off, i tried with pickle.dumps (see mail history below), with the error: <span style="font-size:10.0pt;font-family:"Arial","sans-serif"">pickle.PicklingError:
Can't pickle <type 'function'>: it's not found as __builtin__.function.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">"</span><span style="font-size:11.5pt;font-family:"Calibri","sans-serif";color:#1F497D">stackless.run() returns when
there are no <i>runnable</i> tasklets ...", ok, clear, thanks.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Cheers, Lars</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"> <o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Wed, Oct 9, 2013 at 2:36 PM, lars van Gemerden <<a href="mailto:lars@rational-it.com" target="_blank">lars@rational-it.com</a>> wrote:<o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I am reasonably familiar with pickle (e.g. i know you cant pickle most functions), but this is pretty stackless specific: why can i pickle an empty channel, but not a sending/receiving
channel?<o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Cheers, Lars<o:p></o:p></p>
</div>
</div>
<div>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"> <o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Mon, Oct 7, 2013 at 7:50 PM, Anselm Kruis <<a href="mailto:a.kruis@science-computing.de" target="_blank">a.kruis@science-computing.de</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi Lars,<br>
<br>
you are observing well known deficiencies of the pickle/cPickle implementation of Python. Perhaps sPickle (<a href="http://pypi.python.org/pypi/sPickle" target="_blank">http://pypi.python.org/pypi/sPickle</a>) can pickle the channels.<br>
<br>
Regards<br>
Anselm<br>
<br>
<br>
Am <a href="tel:06.10.2013%2008" target="_blank">06.10.2013 08</a>:58, schrieb lars van Gemerden:<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">maybe double but i got a mail bounce ..<br>
<br>
---------- Forwarded message ----------<br>
From: lars van Gemerden <<a href="mailto:lars@rational-it.com" target="_blank">lars@rational-it.com</a>><br>
Date: Thu, Oct 3, 2013 at 6:15 PM<br>
Subject: Re: [Stackless] deepcopying (pickling) channels<br>
To: The Stackless Python Mailing List <<a href="mailto:stackless@stackless.com" target="_blank">stackless@stackless.com</a>><br>
<br>
<br>
actually both give an error. The only thing different is the error message.<br>
with pickle the code would be:<br>
<br>
---------------------------------------------------------------------------<br>
import stackless, pickle<br>
<br>
class Test(object):<br>
def __init__(self):<br>
self.channel = stackless.channel()<br>
<br>
def run(self):<br>
stackless.tasklet(self.sender)()<br>
stackless.tasklet(self.receiver)()<br>
stackless.run()<br>
<br>
def sender(self):<br>
counter = 0<br>
while counter < 10:<br>
self.channel.send(counter)<br>
counter += 1<br>
<br>
def receiver(self):<br>
counter = 0<br>
while counter < 12:<br>
counter = self.channel.receive()<br>
print counter,<br>
print "done"<br>
<br>
if __name__ == "__main__":<br>
<br>
t = Test()<br>
t.run()<br>
t.channel = None<br>
s = pickle.dumps(t) #OK<br>
<br>
t = Test()<br>
t.run()<br>
s = pickle.dumps(t) #ERROR<br>
-----------------------------------------------------------------------------<br>
and the error:<br>
<br>
pickle.PicklingError: Can't pickle <type 'function'>: it's not found as<br>
__builtin__.function<br>
<br>
otherwise the error behavior is the same as decribed above.<br>
<br>
Cheers, Lars<br>
<br>
(as far as i have read and tested a bit, deepcopy allows more to be copied<br>
then pickle, but cPickle is faster, so i have my own deepcopy:<br>
<br>
def deepcopy(obj):<br>
try:<br>
return cPickle.loads(cPickle.dumps(obj, -1))<br>
except PicklingError:<br>
return copy.deepcopy(obj)<br>
)<br>
<br>
<br>
On Thu, Oct 3, 2013 at 5:19 AM, Richard Tew <<a href="mailto:richard.m.tew@gmail.com" target="_blank">richard.m.tew@gmail.com</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">I'm a little confused. Are you pickling the tasklets, or copying<br>
them? These are different things to Python.<br>
<br>
As far as I know using copy or deepcopy has never been supported for<br>
tasklets and therefore channels.<br>
<br>
Pickling however, is another matter.<br>
<br>
Cheers,<br>
Richard.<br>
<br>
_______________________________________________<br>
Stackless mailing list<br>
<a href="mailto:Stackless@stackless.com" target="_blank">Stackless@stackless.com</a><br>
<a href="http://www.stackless.com/mailman/listinfo/stackless" target="_blank">http://www.stackless.com/mailman/listinfo/stackless</a><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br>
<br>
<br>
<br>
<br>
maybe double but i got a mail bounce ..<br>
<br>
---------- Forwarded message ----------<o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">From: *lars van Gemerden* <<a href="mailto:lars@rational-it.com" target="_blank">lars@rational-it.com</a><br>
<mailto:<a href="mailto:lars@rational-it.com" target="_blank">lars@rational-it.com</a>>><br>
Date: Thu, Oct 3, 2013 at 6:15 PM<br>
Subject: Re: [Stackless] deepcopying (pickling) channels<br>
To: The Stackless Python Mailing List <<a href="mailto:stackless@stackless.com" target="_blank">stackless@stackless.com</a><o:p></o:p></p>
</div>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><mailto:<a href="mailto:stackless@stackless.com" target="_blank">stackless@stackless.com</a>>><br>
<br>
<br>
actually both give an error. The only thing different is the error<br>
message. with pickle the code would be:<br>
<br>
---------------------------------------------------------------------------<br>
import stackless, pickle<br>
<br>
class Test(object):<br>
def __init__(self):<br>
self.channel = stackless.channel()<br>
def run(self):<br>
stackless.tasklet(self.sender)()<br>
stackless.tasklet(self.receiver)()<br>
stackless.run()<br>
def sender(self):<br>
counter = 0<br>
while counter < 10:<br>
self.channel.send(counter)<br>
counter += 1<br>
def receiver(self):<br>
counter = 0<br>
while counter < 12:<br>
counter = self.channel.receive()<br>
print counter,<br>
print "done"<br>
if __name__ == "__main__":<br>
t = Test()<br>
t.run()<br>
t.channel = None<br>
s = pickle.dumps(t) #OK<br>
t = Test()<br>
t.run()<br>
s = pickle.dumps(t) #ERROR<br>
-----------------------------------------------------------------------------<br>
and the error:<br>
<br>
pickle.PicklingError: Can't pickle <type 'function'>: it's not found as<br>
__builtin__.function<br>
<br>
otherwise the error behavior is the same as decribed above.<br>
<br>
Cheers, Lars<br>
<br>
(as far as i have read and tested a bit, deepcopy allows more to be<br>
copied then pickle, but cPickle is faster, so i have my own deepcopy:<br>
<br>
def deepcopy(obj):<br>
try:<br>
return cPickle.loads(cPickle.dumps(obj, -1))<br>
except PicklingError:<br>
return copy.deepcopy(obj)<br>
)<br>
<br>
<br>
On Thu, Oct 3, 2013 at 5:19 AM, Richard Tew <<a href="mailto:richard.m.tew@gmail.com" target="_blank">richard.m.tew@gmail.com</a><o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><mailto:<a href="mailto:richard.m.tew@gmail.com" target="_blank">richard.m.tew@gmail.com</a>>> wrote:<br>
<br>
I'm a little confused. Are you pickling the tasklets, or copying<br>
them? These are different things to Python.<br>
<br>
As far as I know using copy or deepcopy has never been supported for<br>
tasklets and therefore channels.<br>
<br>
Pickling however, is another matter.<br>
<br>
Cheers,<br>
Richard.<br>
<br>
_______________________________________________<br>
Stackless mailing list<o:p></o:p></p>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">
<a href="mailto:Stackless@stackless.com" target="_blank">Stackless@stackless.com</a> <mailto:<a href="mailto:Stackless@stackless.com" target="_blank">Stackless@stackless.com</a>><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br>
<a href="http://www.stackless.com/mailman/listinfo/stackless" target="_blank">
http://www.stackless.com/mailman/listinfo/stackless</a><br>
<br>
<br>
<br>
<br>
--<br>
====================================<br>
Lars van Gemerden<o:p></o:p></p>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a href="mailto:lars@rational-it.com" target="_blank">lars@rational-it.com</a> <mailto:<a href="mailto:lars@rational-it.com" target="_blank">lars@rational-it.com</a>><br>
<a href="tel:%2B31%206%2026%2088%2055%2039" target="_blank">+31 6 26 88 55 39</a> <<a href="tel:%2B31%206%2026%2088%2055%2039" target="_blank">tel:%2B31%206%2026%2088%2055%2039</a>><o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br>
====================================<br>
<br>
<br>
<br>
--<br>
====================================<br>
Lars van Gemerden<o:p></o:p></p>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a href="mailto:lars@rational-it.com" target="_blank">lars@rational-it.com</a> <mailto:<a href="mailto:lars@rational-it.com" target="_blank">lars@rational-it.com</a>><o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><br>
<a href="tel:%2B31%206%2026%2088%2055%2039" target="_blank">+31 6 26 88 55 39</a><br>
====================================<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">_______________________________________________<br>
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</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#888888"><br>
-- <br>
Dipl. Phys. Anselm Kruis science + computing ag<br>
Senior Solution Architect Ingolstädter Str. 22<br>
email <a href="mailto:A.Kruis@science-computing.de" target="_blank">A.Kruis@science-computing.de</a> 80807 München, Germany<br>
phone <a href="tel:%2B49%2089%20356386%20874" target="_blank">+49 89 356386 874</a> fax 737
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<br>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br>
<br clear="all">
<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">--
<br>
====================================<br>
Lars van Gemerden<br>
<a href="mailto:lars@rational-it.com" target="_blank">lars@rational-it.com</a><br>
<a href="tel:%2B31%206%2026%2088%2055%2039" target="_blank">+31 6 26 88 55 39</a><br>
==================================== <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br>
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<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">--
<br>
====================================<br>
Lars van Gemerden<br>
<a href="mailto:lars@rational-it.com" target="_blank">lars@rational-it.com</a><br>
<a href="tel:%2B31%206%2026%2088%2055%2039" target="_blank">+31 6 26 88 55 39</a><br>
==================================== <o:p></o:p></p>
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<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal">-- <br>
====================================<br>
Lars van Gemerden<br>
<a href="mailto:lars@rational-it.com">lars@rational-it.com</a><br>
+31 6 26 88 55 39<br>
==================================== <o:p></o:p></p>
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