I cannot run Pyomo models

[Ayman Afifi]

Hi, 

Sorry I'm new to Pyomo so this might seem a bit naive. I've installed Pyomo and was able to import it to the shell. However, when I try to call my saved model, it gives an error: 'invalid syntax'. My *.py model file is in my Scripts folder in Python\ArcGIS10.2\Scripts. I followed the instructions for calling a model similar to this one below but I still get the same error. Any help?

pyomo solve --solver=glpk diet1.py diet.dat

[Gabriel Hackebeil]

This probably means you have a syntax error in your model file. This type of error occurs when the Python interpreter doesn’t understand something in your file. It probably doesn’t have anything to do with Pyomo at this point. If you’re not getting any information about where the error occurs you should try executing your model file with the Python interpreter:

python diet1.py

Gabe

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[Ayman Afifi]

Thanks Gabriel. The command >>>python diet1.py also gives the same error that I see with >>>pyomo diet1.py . I run the abstract model diet1.py script and I get no error on my console. 'diet1.py' is the example script given in the help manual so I'm assuming it should work! 

Any thoughts?

[Gabe Hackebeil]

Can you send the full error message?

Gabe

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[Siirola, John D]

The problem is that you are trying to run Python (or the Pyomo script) from within the Python interpreter. Both the pyomo script and the examples that Gabe is suggesting are meant to run at the system command prompt. 

John

[Jingyi]

If i run in the terminal(ubuntu 14.10):

pyomo solve --solver=glpk diet1.py diet.dat

it returns pyomo: command not found

If I run that in the python after "import pyomo.core"

it returns: invalid syntax

[Gabriel Hackebeil]

The pyomo command is an executable file located in some directory on your system. If that directory has been added to your PATH environment variable, then you should be able to execute the pyomo command from your terminal. If not, you will need to add it, or provide the full path to the pyomo command (which depends on where Pyomo was installed). For example,

/home/gabe/pyomo/bin/pyomo solve …

Alternatively, you can install Pyomo using the pip command (execute "pip install Pyomo” from the terminal). This will likely cause the pyomo command to be installed into a directory that is already in your PATH.

Gabe