# Questions tagged [pulp]

Questions relevant to the PuLP modelling framework in Python

15 questions with no upvoted or accepted answers
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### Why does PuLP call copy for addition and how can I avoid it?

Using a for loop to append terms to an expression seems to be much faster than summing a group of terms all at once. Constructing the expression using a for loop uses __iadd__, which does not include ...
• 261
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### PuLP Python: How to linearize an inequality involving an integer variable

I am working on a Copper payables problem where the objective function is to maximise the sum of copper payable over a time period, T. The total amount of payable tonnes i.e. what the customer will ...
• 327
959 views

### How can I see the engine log when solving a LP using pulp (python)?

I wonder which command should I use to see how the steps the pulp solver is doing when solving a linear program.
• 39
106 views

### Constraint equivalence in PuLP

I'm working on an optimization problem in PuLP and I have to enforce a daily minimum of shifts and a daily maximum of assigned shifts. I have the following constraints to ensure each day has a minimum ...
• 101
135 views

### Seeking help in pulp scheduling problem

I have successfully implemented a program where I allocate N truck drivers to M gathering hubs for each one of the days of the ...
• 153
1 vote
305 views

### Problem of optimal solution generated with Pulp

I'm trying to use Pulp to solve VRP problem. Here is the model: ...
• 129
1 vote
172 views

### Profit Optimization in Python with Difficult Constraints to Maximize Net Revenue

I am currently trying to work on this problem that determines the best constraints on how to place these 'bids'- please see the second column in the screenshot: The ask at hand is to uncover a model ...
• 11
1 vote
135 views

### Resource constrained LP problem

I am working on Diet Allocation problem. Where we need to provide food piece for protein deficiency. The data is as below: ...
• 19
35 views

### Binary variable taking floating values in multi trip VRP with TW

I am trying to solve a multi trip VRP with time windows in pulp (minimizing total distance travelled). The code is providing optimal results for multi trip VRP without time window constraints (however ...
58 views

### Need help for the python scheduling code

I'm working on a Python application using PuLP for optimization, and I'm having trouble ensuring that only one material is produced on a given day. The constraint prob += pulp.lpSum(production_flag[m][...
33 views

### Shipment Allocation using Pulp

I am trying to create a model where each shipment must be allocated to a route to minimize the freight cost. I am a complete newbie at LP Optimization. Explanation of dataset: Every destination (D1,...
117 views

### Extracting a sequence as a decision variable from a matrix (PuLP)

I am solving a sequencing problem x[i][j], i.e. a binary matrix indicating that product i is followed by ...
• 19
108 views

### Ensure complete cycle in binary succession matrix LP [PuLP]

I have a set of orders N, for which i have to determine an optimal sequence. I wrap this decision within a binary matrix x[i][j], meaning whether i is succeeded by j. For example [[0 1 0 0] [0 0 1 0] [...