using ecos_bb

[madeleineudell]

Hi,

I'm trying to use ecos_bb with cvxpy, and running into installation difficulties. It looks like ecos_bb is only on the origin/develop and origin/dev1.1.0 branches, neither of which has a setup.py file in the python folder. Installing from the egg in python/dist (and from cvxpy master), I get the following error:

Traceback (most recent call last):
File "ilp.py", line 4, in
from cvxpy import *
File "/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/init.py", line 24, in
from cvxpy.problems.problem import Problem
File "/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/problems/problem.py", line 27, in
from cvxpy.problems.solvers.utilities import SOLVERS
File "/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/problems/solvers/utilities.py", line 20, in
from cvxpy.problems.solvers.ecos_intf import ECOS
File "/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/problems/solvers/ecos_intf.py", line 23, in
import ecos
File "/Users/madeleine/anaconda/lib/python2.7/site-packages/ecos-1.0.5-py2.7-macosx-10.5-x86_64.egg/ecos.py", line 1, in
import _ecos
ImportError: dlopen(/Users/madeleine/anaconda/lib/python2.7/site-packages/ecos-1.0.5-py2.7-macosx-10.5-x86_64.egg/_ecos.so, 2): Symbol not found: _check_ctrlc
Referenced from: /Users/madeleine/anaconda/lib/python2.7/site-packages/ecos-1.0.5-py2.7-macosx-10.5-x86_64.egg/_ecos.so
Expected in: dynamic lookup

How should I try out the ecos_bb solver from python?

Thanks!
Madeleine

[hanwang]

Hi Madeleine,

ecos_bb support for python is still experimental but if you would like to
try it out, checkout https://github.com/embotech/ecos-python, update the
submodule. Then run 'python setup.py build' followed by 'python setup.py
install'

Best,
Han

On Tue, Dec 16, 2014 at 4:06 PM, Madeleine Udell notifications@github.com
wrote:

Hi,

I'm trying to use ecos_bb with cvxpy, and running into installation
difficulties. It looks like ecos_bb is only on the origin/develop and
origin/dev1.1.0 branches, neither of which has a setup.py file in the
python folder. Installing from the egg in python/dist (and from cvxpy
master), I get the following error:

Traceback (most recent call last):
File "ilp.py", line 4, in
from cvxpy import *
File
"/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/
init.py", line 24, in
from cvxpy.problems.problem import Problem
File
"/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/problems/problem.py",
line 27, in
from cvxpy.problems.solvers.utilities import SOLVERS
File
"/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/problems/solvers/utilities.py",
line 20, in
from cvxpy.problems.solvers.ecos_intf import ECOS
File
"/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/problems/solvers/ecos_intf.py",
line 23, in
import ecos
File
"/Users/madeleine/anaconda/lib/python2.7/site-packages/ecos-1.0.5-py2.7-macosx-10.5-x86_64.egg/ecos.py",
line 1, in
import _ecos
ImportError:
dlopen(/Users/madeleine/anaconda/lib/python2.7/site-packages/ecos-1.0.5-py2.7-macosx-10.5-x86_64.egg/_ecos.so,
2): Symbol not found: _check_ctrlc
Referenced from:
/Users/madeleine/anaconda/lib/python2.7/site-packages/ecos-1.0.5-py2.7-macosx-10.5-x86_64.egg/_ecos.so
Expected in: dynamic lookup

How should I try out the ecos_bb solver from python?

Thanks!
Madeleine

—
Reply to this email directly or view it on GitHub
#99.

[madeleineudell]

Great, thanks! That works.

For the sake other other seeking to do the same, the following worked for
me:

git clone https://github.com/embotech/ecos-python.git
cd ecos-python
git submodule init
git submodule update
python setup.py build
python setup.py install

I was then able to use ecos_bb with cvxpy by building cvxpy from master via
python setup.py install, and following the example in
cvxpy/tests/test_mip_vars.py.

On Tue, Dec 16, 2014 at 4:13 PM, Han Wang notifications@github.com wrote:

Hi Madeleine,

ecos_bb support for python is still experimental but if you would like to
try it out, checkout https://github.com/embotech/ecos-python, update the
submodule. Then run 'python setup.py build' followed by 'python setup.py
install'

Best,
Han

On Tue, Dec 16, 2014 at 4:06 PM, Madeleine Udell notifications@github.com

wrote:

Hi,

I'm trying to use ecos_bb with cvxpy, and running into installation
difficulties. It looks like ecos_bb is only on the origin/develop and
origin/dev1.1.0 branches, neither of which has a setup.py file in the
python folder. Installing from the egg in python/dist (and from cvxpy
master), I get the following error:

Traceback (most recent call last):
File "ilp.py", line 4, in
from cvxpy import *
File

"/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/

init.py", line 24, in
from cvxpy.problems.problem import Problem
File

"/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/problems/problem.py",

line 27, in
from cvxpy.problems.solvers.utilities import SOLVERS
File

"/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/problems/solvers/utilities.py",

line 20, in
from cvxpy.problems.solvers.ecos_intf import ECOS
File

"/Users/madeleine/anaconda/lib/python2.7/site-packages/cvxpy-0.2.15-py2.7.egg/cvxpy/problems/solvers/ecos_intf.py",

line 23, in
import ecos
File

"/Users/madeleine/anaconda/lib/python2.7/site-packages/ecos-1.0.5-py2.7-macosx-10.5-x86_64.egg/ecos.py",

line 1, in
import _ecos
ImportError:

dlopen(/Users/madeleine/anaconda/lib/python2.7/site-packages/ecos-1.0.5-py2.7-macosx-10.5-x86_64.egg/_ecos.so,

2): Symbol not found: _check_ctrlc
Referenced from:

/Users/madeleine/anaconda/lib/python2.7/site-packages/ecos-1.0.5-py2.7-macosx-10.5-x86_64.egg/_ecos.so

Expected in: dynamic lookup

How should I try out the ecos_bb solver from python?

Thanks!
Madeleine

—
Reply to this email directly or view it on GitHub
#99.

—
Reply to this email directly or view it on GitHub
#99 (comment).

Madeleine Udell
PhD Candidate in Computational and Mathematical Engineering
Stanford University
www.stanford.edu/~udell

[argriffing]

@madeleineudell Thanks! Before reading your recipe, I'd been on a doomed mission to install from https://github.com/embotech/ecos/tree/master/python. Maybe a warning could be added to the readme in that directory...

[adomahidi]

We will do that with v1.1.0, where the python directory will cease to exist in the ecos repo. Sorry for the inconvenience at this point!

[adomahidi]

And thanks Madeleine for the fantastic recipe!