Installing pyomo on python3

[lbertolotti]

Has the site been changed recently? my old optimization files are giving me:

 File "costfunction.py", line 3, in <module>
    import test
  File "/home/lucas/costfunc/test.py", line 2, in <module>
    from coopr.pyomo import *
ImportError: No module named 'coopr'

I need an official guide for installing pyomo on Ubuntu14.04

[David Woodruff]

There will be a new release coming out in the next few weeks with a new installation guide.
But meanwhile, what version do you have?

(Give the command

pyomo --version

to a bash terminal.)

 Dave

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[lbertolotti]

Coopr 3.4 (CPython 2.7.6 on Linux 3.13.0-43-generic)

[lbertolotti]

Has the new version been released?

[William Hart]

A beta release has been cut.  I expect the 4.0 release to be finalized by tomorrow.

--Bill

On Tue, Jan 6, 2015 at 1:09 PM, 'lbertolotti' via Pyomo Forum <pyomo...@googlegroups.com> wrote:

Has the new version been released?

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[lbertolotti]

Can I download the new version?

[Bill Hart]

Yep.  Try it now!

[lbertolotti]

Where is it?

[William Hart]

It's available on PyPI.  See www.pyomo.org for download instructions.

--Bill

On Sat, Jan 10, 2015 at 4:40 AM, 'lbertolotti' via Pyomo Forum <pyomo...@googlegroups.com> wrote:

Where is it?

[lbertolotti]

I was using this book as a guide for Pyomo: http://www.springer.com/gp/book/9781461432258
Is the information there still valid?

from coopr.pyomo import *

is now giving me:

ImportError: No module named coopr.pyomo

[David Woodruff]

Use the installation instructions that can be found at pyomo.org

[lbertolotti]

Already did that:

lucas@lucas-K55VD:~$ pyomo --version

    Seems like you are using OpenOpt from
    commercial Enthought Python Distribution;
    consider using free GPL-licensed alternatives
    PythonXY (http://www.pythonxy.com) or
    Sage (http://sagemath.org) instead.
   
Pyomo 4.0.9682 (CPython 2.7.6 on Linux 3.13.0-49-generic)

[Siirola, John D]

Pyomo 4.0 is 99% compatible with the first edition of The Book.  One of the biggest differences is that the main namespace for pyomo has changed from coopr to pyomo.  So, you should get into the habit of replacing:

 

                from coopr.pyomo import *

 

with

 

                from pyomo.environ import *

 

You can also install the latest release of Coopr (that is, “pip install coopr”), which will install a compatibility layer that will allow the vast majority of existing models and scripts to still run.

 

john

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