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Questions - pulp

How to interpret cProfile results of PuLP

I fear I am a bit in over my head. I have profiled a Mixed Integer Problem (MIP) with cProfile and gprof2dot. The MIP is implemented via the pulp library. The MIP problem is solvable, which I tested o...
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6'38''4

python

profiling

pulp

cprofile

Votes: 0

Answers: 0

AttributeError: 'LpAffineExpression' object has no attribute 'solve', Error in Pullp

I'm trying to implement a problem a basis problem os Set covering with python, but pulp gives me all the time the error: AttributeError: 'LpAffineExpression' object has no attribute 'solve' This is wh...
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jopelines

python

pulp

set-cover

Votes: 0

Answers: 1

Latest Answer

You are overwriting the modelo variable when defining the objective, so it's no longer a pulp.LpProblem. Use modelo += lp.lpSum(x[j] for j in J) instead. Note the += instead of the =. Alternatively,...
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joni

Mixed Integer Linear Programming with pyomo or PuLP

I am new to optimization programming using python and I have a problem with defining a variable in both pyomo and PuLP for a MILP problem. I am using gene expression data and I am confused about how t...
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sandaruwan Ratnayake

optimization

linear-programming

pyomo

pulp

mixed-integer-programming

Votes: 0

Answers: 1

Latest Answer

I'd pick pyomo. I think it is more expressive and easier to read/work with. You'll need to install a solver separately. If that is daunting, pulp comes with CBC built in. This should get you starte...
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AirSquid

PuLP "symbol in wrong position" error and fix

PuLP sometimes gives errors when solving a linear optimization problem. For example, for the following code... import pulp model = pulp.LpProblem(sense=pulp.LpMaximize) Q = pulp.LpVariable(name='Q', ...
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hadizadeh.ali

python

pulp

Votes: 0

Answers: 1

Latest Answer

PuLP seems to have issues with strings starting with 'B' or 'b'; that is, variable and constraint names. So, if in the following code, we write B = pulp.LpVariable(name='_B', lowBound=0, cat='Integer'...
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hadizadeh.ali

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