AMPL API is an interface that allows developers to access the features of the AMPL interpreter from within a programming language.
Questions tagged [amplpy]
6 questions
4
votes
2 answers
How do I fix the amplpy error on search path?
I have recently installed Amplpy for python 3.6.5 (win 32 bit), but I am facing the following issue:
Please make sure that the AMPL folder is in the system search path, or specify the path via:
AMPL(Environment('full path to the AMPL installation…
Poulad
- 41
- 1
3
votes
1 answer
Specifying default values
I have a parameter B in matrix format, defined in the model file as
param B {Rn,Rn};
for which I define the non-sparse values as
from numpy import random
from scipy import sparse
from amplpy import AMPL, Environment, dataframe
B =…
FooBar
- 15,724
- 19
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1
vote
1 answer
amplpy: how to define data to a parameter associated with a set
I'm trying to use amplpy to link a python script to a ampl model, and the real desire is use a script to generate some parameters, and use the ampl to find the optimal values to some variables.
Worth mentioning that the model works fine alone, no…
1
vote
1 answer
Amplpy: How to use output handler?
I am new in AMPL and Python and I am using amplpy to run an AMPL model, using lpopt solver.
I need to get the output result of the solver in a way that I can act over it, i.e. I need to know if the optimal solution was found to decide if I can use…
matrj
- 21
- 4
1
vote
1 answer
AMPLPY decrypt and encrypt
I am using amplpy to access AMPL from my python.
I want my dat file to not be in plain text.
Is it possible?
I cannot find any api to do it
user903772
- 1,554
- 5
- 32
- 55
0
votes
2 answers
How to map indices of different sets in pyomo?
I have two sets in Pyomo, the first one is G=/GD1,GD2,GD3/, And the second one is N=/N1,N2,N3,...,N32,N33/. Naturally they have symbolic representation here for the sake of simplicity. I would like to map G into N, in order to define the relation…
