CODEWITHSUNDEEP
pythonor-tools
Sledge
Sledge

Reputation: 1345

Python module ortools apparently installs incompletely

I am trying to set up ortools on my Mac.

I installed via pip install ortools. I can verify that the package installed successfully.

 conda list | grep ortools
WARNING: The conda.compat module is deprecated and will be removed in a future release.
ortools                   7.1.6720                 pypi_0    pypi

When I try to use the library, it looks like there are missing functions. I followed along with the example here:

https://developers.google.com/optimization/introduction/python

This returns an error: 

from __future__ import print_function
from ortools.linear_solver import pywraplp

Traceback (most recent call last):
  File "simple_ortools_example.py", line 2, in <module>
    from ortools.linear_solver import pywraplp
ImportError: No module named ortools.linear_solver

I can import the module otherwise and look at the functions interactively:

>>> ortools.__
ortools.__cached__          ortools.__gt__(             ortools.__path__
ortools.__class__(          ortools.__hash__(           ortools.__reduce__(
ortools.__delattr__(        ortools.__init__(           ortools.__reduce_ex__(
ortools.__dict__            ortools.__init_subclass__(  ortools.__repr__(
ortools.__dir__(            ortools.__le__(             ortools.__setattr__(
ortools.__doc__             ortools.__loader__          ortools.__sizeof__(
ortools.__eq__(             ortools.__lt__(             ortools.__spec__
ortools.__file__            ortools.__name__            ortools.__str__(
ortools.__format__(         ortools.__ne__(             ortools.__subclasshook__(
ortools.__ge__(             ortools.__new__(            ortools.__version__
ortools.__getattribute__(   ortools.__package__

I just used tab complete here to see what was available. Sure enough there is no linear_solver attached to the ortools module.

I'm a bit at a loss as to what to try next. Any advice would be apreciated.

Upvotes: 0

Views: 6759

Answers (2)

Waqas Khalid Obeidy
Waqas Khalid Obeidy

Reputation: 676

I faced the same issue today on Windows. Figured out that it is usually caused due to missing Microsoft Visual Studio 20** redistributables c++ (see here).

This is how I solved it (Python 3.7.6, ortools Version: 7.5.*).

  1. Got the latest Microsoft Visual Studio 20** redistributables c++ from https://support.microsoft.com/en-my/help/2977003/the-latest-supported-visual-c downloads
  2. Installed it and Restarted the computer.
  3. Uninstall the ortools 'python -m pip uninstall ortools'
  4. Install back the ortools 'python -m pip install --user ortools'
  5. Validated installation with python -c "from ortools.linear_solver import pywraplp"

Upvotes: 1

Sledge
Sledge

Reputation: 1345

I downgraded to an earlier version which solves the problem.

pip install ortools==6.7.4973

Upvotes: 2

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