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Questions tagged [python-constraint]

13 questions
13
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2 answers

constraint satisfaction problem missing one constraint

I'm a lab practises tutor at the university, based on last year student comments, we wanted, my boss and I, to address them. My boss chose to go with writing a C script and I pick python (python-constraint) to try to resolve our problem.…
Florian Bernard
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Solving simultaneous linear and non-linear equations and inequalities

I have a number of linear and non-linear equations and inequalities (about twenty), and am looking for solutions to these. The equations either relate or constrain a number of variables. These variables are either constant, allowed to be within some…
Heisenbugs
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Cannot import name 'CSP' from library csp

I am executing the following code: from typing import Dict,List,Optional from csp import CSP from constraint import Constraint from typing import Dict,List,Optional class QueensConstraint(Constraint[int,int]): def…
Hamza Ali
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How to look at multiple constraints together in python-constraint library

I have been practicing using the python constraint library by solving logic puzzles with it. I've found it an absolute joy to work with, but I'm stuck on a relatively simple puzzle. I can solve it programatically, but the goal is to solve it using…
hoshisabi
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KeyError in python constraint in a csp scheduler problem

I need to build a csp scheduler that given a set of students with name,competence,disponibility and a set of tasks with name,competence_required,duration prints (or better show it in a graph) what task a student has to do. I'm at the beginning of…
nicola luna
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How to use python-constraint correclty

I tried the python-constraint library to solve a CSP problem, but I don't understand why I got 2048 solutions with a dataframe of 4 records. My dataframe represents a set of distances from the closest elements to fountains in parks, and I use CSP to…
Adil Blanco
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Constraint problem doesn't handle some test cases

I have a python constraint problem like this: You need to make a schedule for the presentation of papers for a conference. A total of 10 papers from several fields are to be presented at the conference: Artificial Intelligence (AI), Machine Learning…
Бојан Василевски
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Identify Graph nodes belonging to a clique (Max clique problem with Python constraints api)

I am trying to solve the max clique problem using Python's constraints api and I am planning to use the MIP-model, where there is a boolean for each n[i] node indicating if the node belongs (1 / true), or not (0 / false), to a clique. The constraint…
C96
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Python-constraint variables that take their name instead of the value

I want to multiply the range of each variable because I can't use more than 5 kg and 50 euros so I multiply the weight of each product and its value but instead, the program returns me an error that it's taking the value an instead of the…
Arévalo
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How to program CSP bidimensional problem with python-constraint

I need to use python-constraint for solving a stowage problem. I have 2 different types of containers (standard S and refrigereted R) and two possible destinations. Containers must be stowed as shown in the next grid that N N N N N N N N X E E X X X…
sergiohzlz
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Problems with adding constraints in a loop

I have this: import constraint p = constraint.Problem() t = [0,5] c = [3,7] s = range(len(t)) n = 12 p.addVariables([str(i) for i in s], range(n)) p.addConstraint(lambda x: (x+t[0])%n in c, ('0')) …
klutt
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Problem set up issues with python-constraint

I have a dataframe df and need to compute a column “res” by satisfying the conditions below - elements of "res" have to be within the limit 0.5≤res≤4.5 sum (df.res*df.A)==1 orders of "res" have to be var1>var2>var3>……>var14 or df.order I have…
Jainul
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Why the constraint cannot generate all possible combinations?

I am trying to generate all possible combinations under some constraints using the python-constraint. Here are the main() code: list1 = [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0] list2…
JJT
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