Gurobi support for Python 3.5

[David Myers]

Just wondering if there were any plans for Gurobi to support the use of Python 3.5.

Thanks in advance for any help.

--David

[Wilmer Henao]

Hi David. I have been using python 3.5 for a couple of days already. It seems like they just updated their documentation. Look at page 99 of the windows manual (also in linux). http://www.gurobi.com/documentation/6.5/quickstart_windows.pdf

[Monique Bakker]

I saw that Gurobi now supports Python 3.5 on Windows 64 bit. But I can't get it to work, keep getting the error  

ImportError: No module named 'gurobipy'

Also when I open Gurobi the console shows that Python 2.7.8 is the default. How do I change this? Do I need to upgrade Gurobi? (academic license)

Thanks!

[Sonja Mars]

Hi,

> I saw that Gurobi now supports Python 3.5 on Windows 64 bit. But I can't get it to work, keep getting the error
>
> ImportError: No module named 'gurobipy'

You will first have to install Gurobi into this specific Python version. If this is Anaconda Python, please follow the instructions under "Step 2" on this page: http://www.gurobi.com/documentation/6.5/quickstart_windows/installing_the_anaconda_py.html#section:Anaconda.
For other Python distributions see here: https://www.gurobi.com/documentation/6.5/quickstart_windows/the_gurobi_python_interfac.html

> Also when I open Gurobi the console shows that Python 2.7.8 is the default. How do I change this? Do I need to upgrade Gurobi? (academic license)

This is the Python version that comes with Gurobi, you cannot change this.

Best regards,
Sonja

-----------------------------------------------------------------
Dr. Sonja Mars
Gurobi Optimization
ma...@gurobi.de
-----------------------------------------------------------------
Gurobi Optimizer 6.5 — State-of-the-art performance and best-in-class support
for your most important problems. Learn more at www.gurobi.com.

[Enrique Fernández]

When can we expect Python 3.5 support for OSX?

According to Python developers, no new projects should be started in Python2, as it is approaching its end of life.

Gurobi is the only package that I need that does not support Python3.

Thanks!

[Sonja Mars]

Hi,

We just released Gurobi version 7.0. This version now supports Python 3.5 on Mac.

Best regards,
Sonja


----
Dr. Sonja Mars
Gurobi Optimization - Technical Support

[Enrique Fernández]

Awesome. Thanks!

[fernando...@uas.edu.mx]

Hi Enrique and Sonja,

Have you already installed Gurobi 7.0 and used Python 3.5? I have some problems for installing gurobi on Anaconda (Python 3.5). When I run this command, I got this:

>>> conda config --add channels http://conda.anaconda.org/gurobi

  File "<stdin>", line 1

    conda config --add channels http://conda.anaconda.org/gurobi

               ^

SyntaxError: invalid syntax

Any solution?

[Renan Garcia]

This error is due to the fact that you are running the conda command from within the Python shell. You should be running it from an ordinary command prompt.

--

---
You received this message because you are subscribed to the Google Groups "Gurobi Optimization" group.
To unsubscribe from this group and stop receiving emails from it, send an email to gurobi+un...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[fernando...@uas.edu.mx]

Hi there,

When I ran the conda command on an ordinary command prompt it worked...but, now, when I want to run a gurobi program on spyder I have this:

runfile('/Users/DrFernando/.spyder-py3/temp.py', wdir='/Users/DrFernando/.spyder-py3')

Traceback (most recent call last):

  File "<ipython-input-1-8f573f30d3da>", line 1, in <module>

    runfile('/Users/DrFernando/.spyder-py3/temp.py', wdir='/Users/DrFernando/.spyder-py3')

  File "/Users/DrFernando/anaconda/lib/python3.5/site-packages/spyder/utils/site/sitecustomize.py", line 866, in runfile

    execfile(filename, namespace)

  File "/Users/DrFernando/anaconda/lib/python3.5/site-packages/spyder/utils/site/sitecustomize.py", line 102, in execfile

    exec(compile(f.read(), filename, 'exec'), namespace)

  File "/Users/DrFernando/.spyder-py3/temp.py", line 2, in <module>

    from gurobipy import *

  File "/Users/DrFernando/anaconda/lib/python3.5/site-packages/gurobipy/__init__.py", line 1, in <module>

    from .gurobipy import *

ImportError: dlopen(/Users/DrFernando/anaconda/lib/python3.5/site-packages/gurobipy/gurobipy.so, 2): Library not loaded: /Library/Frameworks/Python.framework/Versions/3.5/Python

  Referenced from: /Users/DrFernando/anaconda/lib/python3.5/site-packages/gurobipy/gurobipy.so

  Reason: image not found

I thought then, that I have to run in the python console the command "import gurobipy", and I have this:

import gurobipy

Traceback (most recent call last):

  File "<ipython-input-2-1a30be95fe9a>", line 1, in <module>

    import gurobipy

  File "/Users/DrFernando/anaconda/lib/python3.5/site-packages/gurobipy/__init__.py", line 1, in <module>

    from .gurobipy import *

ImportError: dlopen(/Users/DrFernando/anaconda/lib/python3.5/site-packages/gurobipy/gurobipy.so, 2): Library not loaded: /Library/Frameworks/Python.framework/Versions/3.5/Python

  Referenced from: /Users/DrFernando/anaconda/lib/python3.5/site-packages/gurobipy/gurobipy.so

  Reason: image not found

I also tried this:

from gurobipy import *

Traceback (most recent call last):

  File "<ipython-input-3-ef341d965cc7>", line 1, in <module>

    from gurobipy import *

  File "/Users/DrFernando/anaconda/lib/python3.5/site-packages/gurobipy/__init__.py", line 1, in <module>

    from .gurobipy import *

ImportError: dlopen(/Users/DrFernando/anaconda/lib/python3.5/site-packages/gurobipy/gurobipy.so, 2): Library not loaded: /Library/Frameworks/Python.framework/Versions/3.5/Python

  Referenced from: /Users/DrFernando/anaconda/lib/python3.5/site-packages/gurobipy/gurobipy.so

  Reason: image not found

I would really appreciate your help, I´am novice using Gurobi. 

[Sonja Mars]

Hi,

Did you execute the following two commands in a command prompt:

conda config --add channels http://conda.anaconda.org/gurobi

conda install gurobi

If this was successful, open a python shell by typing 

python 

in the command prompt and then

from gurobipy import *

Is this working for you? if not, can you send a screenshot of showing this?

Thanks and best regards, 

[Jeremy Zucker]

Hi folks,

I have installed previous versions of gurobi on a mac, but now I am trying to install gurobi 7 using anaconda:

When I tried to install gurobi using anaconda, and got the following error:

bash$ conda config --add channels http://conda.anaconda.org/gurobi

bash$ conda install gurobi

conda install gurobi

Using Anaconda Cloud api site https://api.anaconda.org

Fetching package metadata .............Error: Invalid index file: http://conda.anaconda.com/gurobi/osx-64/repodata.json: Expecting value: line 1 column 1 (char 0)

bash$ python

Python 3.5.2 |Anaconda 2.5.0 (x86_64)| (default, Jul  2 2016, 17:52:12) 

[GCC 4.2.1 Compatible Apple LLVM 4.2 (clang-425.0.28)] on darwin

Type "help", "copyright", "credits" or "license" for more information.

>>> 

Any advice would be appreciated.

Sincerely,

Jeremy

[Jeremy Zucker]

Upgraded to Anaconda3-4.0.0

and now this is the error:

bash$ conda install gurobi

conda install gurobi

Using Anaconda Cloud api site https://api.anaconda.org

Fetching package metadata: ..........An unexpected error has occurred, please consider sending the

following traceback to the conda GitHub issue tracker at:

    https://github.com/conda/conda/issues

Include the output of the command 'conda info' in your report.

Traceback (most recent call last):

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/bin/conda", line 6, in <module>

    sys.exit(main())

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/site-packages/conda/cli/main.py", line 139, in main

    args_func(args, p)

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/site-packages/conda/cli/main.py", line 146, in args_func

    args.func(args, p)

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/site-packages/conda/cli/main_install.py", line 62, in execute

    install.install(args, parser, 'install')

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/site-packages/conda/cli/install.py", line 240, in install

    prefix=prefix)

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/site-packages/conda/cli/common.py", line 595, in get_index_trap

    return get_index(*args, **kwargs)

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/site-packages/conda/api.py", line 43, in get_index

    unknown=unknown)

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/site-packages/conda/utils.py", line 118, in __call__

    value = self.func(*args, **kw)

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/site-packages/conda/fetch.py", line 259, in fetch_index

    repodatas.append((url, future.result()))

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/concurrent/futures/_base.py", line 398, in result

    return self.__get_result()

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/concurrent/futures/_base.py", line 357, in __get_result

    raise self._exception

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/concurrent/futures/thread.py", line 55, in run

    result = self.fn(*self.args, **self.kwargs)

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/site-packages/conda/fetch.py", line 65, in func

    res = f(*args, **kwargs)

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/site-packages/conda/fetch.py", line 103, in fetch_repodata

    cache = json.loads(bz2.decompress(resp.content).decode('utf-8'))

  File "/Users/zuck016/.pyenv/versions/anaconda3-4.0.0/lib/python3.5/bz2.py", line 348, in decompress

    res = decomp.decompress(data)

OSError: Invalid data stream

(anaconda3-4.0.0) bash-3.2$ conda info

conda info

Using Anaconda Cloud api site https://api.anaconda.org

Current conda install:

             platform : osx-64

        conda version : 4.0.5

  conda-build version : 0+unknown

       python version : 3.5.1.final.0

     requests version : 2.9.1

     root environment : /Users/zuck016/.pyenv/versions/anaconda3-4.0.0  (writable)

  default environment : /Users/zuck016/.pyenv/versions/anaconda3-4.0.0

     envs directories : /Users/zuck016/.pyenv/versions/anaconda3-4.0.0/envs

        package cache : /Users/zuck016/.pyenv/versions/anaconda3-4.0.0/pkgs

         channel URLs : http://conda.anaconda.org/gurobi/osx-64/

                        http://conda.anaconda.org/gurobi/noarch/

                        http://conda.anaconda.com/gurobi/osx-64/

                        http://conda.anaconda.com/gurobi/noarch/

                        https://conda.anaconda.org/bioconda/osx-64/

                        https://conda.anaconda.org/bioconda/noarch/

                        https://conda.anaconda.org/r/osx-64/

                        https://conda.anaconda.org/r/noarch/

                        https://repo.continuum.io/pkgs/free/osx-64/

                        https://repo.continuum.io/pkgs/free/noarch/

                        https://repo.continuum.io/pkgs/pro/osx-64/

                        https://repo.continuum.io/pkgs/pro/noarch/

          config file : /Users/zuck016/.condarc

    is foreign system : False

(anaconda3-4.0.0) bash-3.2$ 

On Thursday, November 3, 2016 at 1:52:37 AM UTC-7, Sonja Mars wrote:

[Sonja Mars]

Hi,

It seems you have added the Gurobi channel twice:

http://conda.anaconda.org/gurobi/osx-64/
                        http://conda.anaconda.org/gurobi/noarch/
                        http://conda.anaconda.com/gurobi/osx-64/
                        http://conda.anaconda.com/gurobi/noarch/

And one of the errors you are seeing, is because 

http://conda.anaconda.com/gurobi/osx-64/
                        http://conda.anaconda.com/gurobi/noarch/

don't exist, please remove those and always use those with .org instead. Removing channels can be done with this command:

conda config --remove channels http://conda.anaconda.com/gurobi

More details about conda can be found here: 

http://conda.pydata.org/docs/faq.html

Additionally, it looks like you are using Anaconda cloud. 

Using Anaconda Cloud api site https://api.anaconda.org
Fetching package metadata: ..........

Maybe you should consider contacting conda like proposed here:

An unexpected error has occurred, please consider sending the
following traceback to the conda GitHub issue tracker at:

    https://github.com/conda/conda/issues

Include the output of the command 'conda info' in your report.

This does not look like a Gurobi issue. 

Best regards, 

[Marko Budinich]

Hi everyone,

I use OSX 10.11.6 (El Capitan) and recently updated from gurobi version 6.0.4 to version 7.0.1 and from python 2.7 to python 3.5 using MacPorts. When installing gurobipy (using setup.py), got the following error:

ImportError: dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/gurobipy/gurobipy.so, 2): Library not loaded: /Library/Frameworks/Python.framework/Versions/3.5/Python
  Referenced from: /opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/gurobipy/gurobipy.so
  Reason: image not found

I solved by either creating a symbolic link to library:

sudo mkdir -p /Library/Frameworks/Python.framework/Versions/3.5/
sudo ln -s /opt/local/Library/Frameworks/Python.framework/Versions/3.5/Python /Library/Frameworks/Python.framework/Versions/3.5/Python

or a direct call on install_name_tool:

sudo install_name_tool -change /Library/Frameworks/Python.framework/Versions/3.5/Python /opt/local/Library/Frameworks/Python.framework/Versions/3.5/Python /opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/gurobipy/gurobipy.so

I post it here in case anyone runs over the same problem.

Cheers,
Marko

[x.man...@gmail.com]

OSX El Capitan
Gurobi 7.5

trying to install Gurobi on python 3.6, I get following error:

(python3env)$ python3 setup.py install
running install
running build
running build_py
error: package directory 'lib/python3.6/gurobipy' does not exist

any hints to fix this?

[Rennan Chagas]

I had problems to use gurobipy with python 3.6. I tried Marko's suggestion but did not work.

Check If you can use gurbi command line with gurobi.ch terminal command. If so, you can use with python2. That actually worked for me after running python2 setup install

 Now I am using gurobi and gurobipy with python 2. In order to not have to rebuild all your projects to python2 you just have to add this code lines in the beginning of your files and you'll be able to code with python 3 syntax

from __future__ import (absolute_import, division, print_function,

generators, nested_scopes, unicode_literals, with_statement)

[Enrique Fernández]

I've actually been using python 3.6 with Gurobi 7.5 for quite some time and it's worked great.

I recommend people use Anaconda and install Gurobi with conda as indicated in the Gurobi documentation.

No issues whatsoever in either OSX 10.11 El Capitan, or 10.12 Sierra.

[x.man...@gmail.com]

Thanks Enrique.  if possible I am hoping to make it work with pip. mixing up pip and conda has not worked well for me in the past. 

[x.man...@gmail.com]

Thanks Rennan,  That's good to know. I have gurobipy working in python2 , but wanted to upgrade my codebase to python3, for reasons related to joblib's performance features that are not being ported to python2 (https://github.com/scikit-learn/scikit-learn/issues/3835).

On Thursday, October 26, 2017 at 3:17:00 PM UTC-4, Rennan Chagas wrote: