[Scons-users] Issue with dill

[Albert Arquer]

Hello again,

I wrote to dill developers and they pointed out the fact that apparently
scons renames the pickle module to cPickle, and apparently dill needs
pickle to be named as-is (sounds reasonable to me).

If you look in SCons.compat you can see how the module is renamed for some
reason.

I figured a way to get around it by adding "import dill" in the scons
launcher script, since everything seems to work as soon as dill is imported
before SCons itself.
However I don't really like having to go around touching scons sources...
and what if I want to source my sconstruct scripts from a normal python
shell??

Does anybody know why scons does this? is there any other "cleaner" way
around this?

2016-11-24 20:51 GMT+01:00 Dirk Bächle <tshortik at gmx.de>:

> Hi Albert,
>
> On 24.11.2016 17:24, Albert Arquer wrote:
>
>> Hello,
>>
>> I have been trying to do some tricky stuff with scons in order to be able
>> to detect subtle changes that where not original picked up
>> by scons. Long story short, I think I found a way with the dill package.
>>
>> I have installed dill and while I can import it into a normal python
>> shell or include it in a normal python script, when I import it
>> from my sconstruct I get:
>>
>> scons: Reading SConscript files ...
>> AttributeError: 'builtin_function_or_method' object has no attribute
>> 'dispatch':
>>   File ".../SConstruct_new", line 2:
>>     from GenericModule import *
>>   File ".../GenericModule.py", line 20:
>>     import dill
>>   File ".../python/2.7.8/lib/python2.7/site-packages/dill-0.2.5-py2.7.egg/dill/__init__.py",
>> line 26:
>>     from .dill import dump, dumps, load, loads, dump_session,
>> load_session, \
>>   File ".../python/2.7.8/lib/python2.7/site-packages/dill-0.2.5-py2.7.egg/dill/dill.py",
>> line 371:
>>     class Pickler(StockPickler):
>>   File ".../python/2.7.8/lib/python2.7/site-packages/dill-0.2.5-py2.7.egg/dill/dill.py",
>> line 373:
>>     dispatch = MetaCatchingDict(StockPickler.dispatch.copy())
>>
>>
>> I have read somewhere about an environment variable called
>> SCONS_HORRIBLE_REGRESSION_TEST_HACK, while I have no idea what that does,
>> I have tried it and it still fails...
>>
>> I really need dill... what can I do?
>>
>>
> for a start, you could show us the full (and verbatim) contents of your
> "SConstruct_new" and "GenericModule.py" files. It's important to see which
> other modules you try to import...SCons is doing some wrapping around
> cPickle where needed, and the exact order in which things are initialized
> will probably make a difference.
>
> I guess you already found
>
>   http://scons-users.scons.narkive.com/vqa4FUWi/scons-not-
> playing-well-with-scipy
>
> while "searching the web"? Is that where you have the variable name
> SCONS_HORRIBLE_REGRESSION_TEST_HACK from?
>
> Best regards,
>
> Dirk
>
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