In-memory data exchange
Description
- ugiodense.py: Exchanging data between model and host application. Dense data (requires burglar8p.mos)
- ugiosparse.py: Exchanging data between model and host application. Sparse data, string indices (requires burglar9p.mos)
Difficulty rating: 3 (intermediate)
Source Files
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burglar9p.mos
(!******************************************************
Mosel User Guide Example Problems
=================================
file burglar9p.mos
``````````````````
Same as burglar2.mos, with input from/output to
calling application via a parameterized data source.
(c) 2026 Fair Isaac Corporation
author: S. Heipcke, Mar. 2006, rev. B. Vieira 2026
*******************************************************!)
model Burglar9p
uses "mmxprs"
parameters
DATASOURCE = 'burglar.dat' ! Data source (overridden to 'moselpy:' from Python)
WTMAX = 102 ! Maximum weight allowed
end-parameters
declarations
ITEMS: set of string ! Index set for items
VALUE: array(ITEMS) of real ! Value of items
WEIGHT: array(ITEMS) of real ! Weight of items
soltake: array(ITEMS) of real ! Solution values
end-declarations
initializations from DATASOURCE
VALUE WEIGHT
end-initializations
declarations
take: array(ITEMS) of mpvar ! 1 if we take item i; 0 otherwise
end-declarations
! Objective: maximize total value
MaxVal:= sum(i in ITEMS) VALUE(i)*take(i)
! Weight restriction
sum(i in ITEMS) WEIGHT(i)*take(i) <= WTMAX
! All variables are 0/1
forall(i in ITEMS) take(i) is_binary
maximize(MaxVal) ! Solve the MIP-problem
! Output solution to calling application
forall(i in ITEMS) soltake(i):= getsol(take(i))
initializations to DATASOURCE
soltake
end-initializations
end-model
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