Originally posted by: NellyMonserrat

Hi everybody. 

I've heard  that pypy is a fast, compilant alternative implementation of python languaje, since I have a model coding in python, I'm trying to use it, but I have problems linking it to cplex. Does anyone have idea of how do it? Cplex is already link with python, so, when I run the program with just python, everything is ok, but when I try to used pypy I get this error: ImportError: No module named cplex.

Thanks in advantage!

The most likely reason for this error is that cplex is not in your PYTHONPATH. Try setting your PYTHONPATH variable so that it points to the cplex/python/2.6/x86-64_linux (adjust to your python version and OS type) directory in your CPLEX installation. You need to set the PYTHONPATH variable before you start python.

I am not an expert in this but from the pypy website it is not immediately clear to me whether this is going to work or not. The CPLEX Python module uses native code and I don't know whether the native code interface in pypy is the same as for cpython.

Originally posted by: NellyMonserrat

Hi Daniel, thanks so much for replying. I still have the problem, even though cplex is already in the path. Look:

>>>>sys.path
['', '/usr/lib/pypy/lib_pypy/__extensions__', '/usr/lib/pypy/lib_pypy', '/usr/lib/pypy/lib-python/2.7', '/usr/lib/pypy/lib-python/2.7/lib-tk', '/usr/lib/pypy/lib-python/2.7/plat-linux2', '/usr/local/lib/pypy2.7/dist-packages', '/usr/lib/pypy/dist-packages', '/usr/lib/pypy/dist-packages/cplex/lib/python/cplex']
>>>> 

When I import cplex, I get this message:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "cplex/__init__.py", line 43, in <module>
    import callbacks
  File "cplex/callbacks.py", line 48, in <module>
    from _internal._aux_functions import apply_freeform_two_args, apply_freeform_one_arg
  File "cplex/_internal/__init__.py", line 22, in <module>
    import _list_array_utils
  File "cplex/_internal/_list_array_utils.py", line 13, in <module>
    import _pycplex as CPX
  File "cplex/_internal/_pycplex.py", line 19, in <module>
    _pycplex_platform = swig_import_helper()
  File "cplex/_internal/_pycplex.py", line 15, in swig_import_helper
    _mod = imp.load_module('_pycplex_platform', fp, pathname, description)
  File "cplex/_internal/_pycplex_platform.py", line 39, in <module>
    from cplex._internal.py1013_cplex1251 import *
ImportError: No module named cplex._internal.py1013_cplex1251

Could you please help me? :(

@NellyMonserrat fd38d32e-d2c9-4593-9089-ceaa4357511f​, no, the CPLEX Python API will not work with PyPy.  The ImportError you're getting is triggered because PyPy is not able to load the shared library (py1013_cplex1251.so).  As indicated on the PyPy compatibility page, "C extensions need to be recompiled for PyPy in order to work."  This is not currently supported.

Originally posted by: NellyMonserrat

Hi, thanks so much for your help. Now I can stop trying this works .