[Scons-users] import pandas into SConstruct

[chris warth]

Thanks!  If it's any help, I've reduced the example to one that doesn't
involve pandas at all.  It seems that under scons, 'pkl.Unpickler' is a
function rather than a class.

$ cat scons.py

import pickle as pkl
print type(pkl.Unpickler)

class Unpickler(pkl.Unpickler):
    pass

$ python scons.py




<type 'classobj'>

$ scons -f scons.py




scons: Reading SConscript files ...
<type 'builtin_function_or_method'>
TypeError: Error when calling the metaclass bases
    cannot create 'builtin_function_or_method' instances:
  File "/path/explore/scons.py", line 5:
    class Unpickler(pkl.Unpickler):


On Thu, Mar 10, 2016 at 5:09 PM, Bill Deegan <bill at baddogconsulting.com>
wrote:

> Just built a virtualenv with pandas and scons.
> Get same stack trace.
> Let me take a quick look and see if it's something simple.
>
> -Bill
>
> On Thu, Mar 10, 2016 at 7:49 PM, William Blevins <wblevins001 at gmail.com>
> wrote:
>
>> See inline.
>>
>> On Thu, Mar 10, 2016 at 10:39 PM, chris warth <cswarth at gmail.com> wrote:
>>
>>> I am having trouble importing the pandas package into an SConstruct file.
>>> Can anyone confirm if this is real defect or just something in my
>>> environment?
>>>
>>> Thanks for any help,
>>>
>>> - Chris
>>>
>>>
>>> $ cat >scons.test
>>>> import pandas as pd
>>>> ^D
>>>> $ scons -f scons.test
>>>> scons: Reading SConscript files ...
>>>> TypeError: Error when calling the metaclass bases
>>>>     cannot create 'builtin_function_or_method' instances:
>>>>   File "/path/explore/scons.test", line 1:
>>>>     import pandas as pd
>>>>   File
>>>> "/path/venv/local/lib/python2.7/site-packages/pandas/__init__.py", line 48:
>>>>     from pandas.io.api import *
>>>>   File "/path/venv/local/lib/python2.7/site-packages/pandas/io/api.py",
>>>> line 14:
>>>>     from pandas.io.pickle import read_pickle, to_pickle
>>>>   File
>>>> "/path/venv/local/lib/python2.7/site-packages/pandas/io/pickle.py", line 1:
>>>>     from pandas.compat import cPickle as pkl, pickle_compat as pc, PY3
>>>>   File
>>>> "/path/venv/local/lib/python2.7/site-packages/pandas/compat/pickle_compat.py",
>>>> line 57:
>>>>     class Unpickler(pkl.Unpickler):
>>>>
>>>
>>
>> This error isn't coming from SCons. This error is coming from trying to
>> import from the pandas library. Right? Is the version of pandas installed
>> setup for python3 rather than python2?
>>
>>
>>> $ python --version
>>>> Python 2.7.6
>>>> $ scons --version
>>>> SCons by Steven Knight et al.:
>>>>         script: v2.4.1.rel_2.4.1:3453:73fefd3ea0b0, 2015/11/09
>>>> 03:25:05, by bdbaddog on ubuntu1404-32bit
>>>>         engine: v2.4.1.rel_2.4.1:3453:73fefd3ea0b0, 2015/11/09
>>>> 03:25:05, by bdbaddog on ubuntu1404-32bit
>>>>         engine path:
>>>> ['/shared/silo_researcher/Matsen_F/MatsenGrp/working/cwarth/founder-inference-bakeoff/venv/lib/scons-2.4.1/SCons']
>>>> Copyright (c) 2001 - 2015 The SCons Foundation
>>>> $ python -c 'import pandas as pd; print pd.__version__'
>>>> 0.17.1
>>>
>>>
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>>>
>>>
>>
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>
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