stephane-caron/lpsolvers

Linear programming solvers in Python with a unified API

lpsolvers's Issues

Doesn't install via pip or pip3

$ pip install lpsolvers
Collecting lpsolvers
Using cached https://files.pythonhosted.org/packages/6d/88/7134bcbf55e06b80d3a147b55760e0467d46f30bb66786c67ab1fe79f3ca/lpsolvers-0.8.8.tar.gz
Collecting cvxopt (from lpsolvers)
Using cached https://files.pythonhosted.org/packages/b8/d7/14dee48a26af514e03d2f00347b2b79e5ae558dc8497e5f64cfa847a988f/cvxopt-1.2.1-cp27-cp27mu-manylinux1_x86_64.whl
Collecting pycddlib (from lpsolvers)
Using cached https://files.pythonhosted.org/packages/1c/e7/ba71780e10fd9787cd7f1e05ce81859433b5c8e9abb135b4039202878ac1/pycddlib-2.0.0.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-build-42YLj7/pycddlib/setup.py", line 49, in
from Cython.Distutils import build_ext
ImportError: No module named Cython.Distutils

----------------------------------------

Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-42YLj7/pycddlib/

Error in Readme (command seems to solve minimization not maximization)

I think the command solve_lp(c,G,h) solves the program

min c.T x : Gx <= h

(not max) as against what is currently mentioned in the documentation.

Check by running the following program (attaching the polytope for reference)
Attaching ref to cvxopt cone solver page (http://cvxopt.org/userguide/coneprog.html#linear-cone-programs)

c = array([1,1.])
G = array([[0, -1.],[-1., 0],[1,2],[2,1]])
h = array([0.,0,3,3])
print(solve_lp(c,G,h))

c = array([-1,-1.])
G = array([[0, -1.],[-1., 0],[1,2],[2,1]])
h = array([0.,0,3,3])
print(solve_lp(c,G,h))

Discrepancy in ReadME

Under "Usage" section it should read

solve_Lp(c, G,h A, b)

instead of

solve_Lp(c, G,h A, b)

Version of lpsolve() on which 'lpsolvers' is based ?

Hi,
Thank you for making this port available.
I saw no mention of and would be interested in knowing:

• the version of lpsolve() en la que se basa `lpsolvers' ? Is it v5.5.2.5 ?
• the latest Python version with which your package is compatible ? (if relevant)

Thank you.