mip-tool 0.0.2

`mip-tool` is a package for Python-MIP.

MIP-Tool

MIP-Tool is a package for Python-MIP.

Installation

pip install mip-tool

Example

Non-convex piecewise linear constraint

import numpy as np
from mip import INF, Model, OptimizationStatus
from mip_tool import add_lines, show_model

m = Model()
x = m.add_var("x", lb=-INF)
y = m.add_var("y", obj=-1)
curve = np.array([[-2, 6], [-1, 7], [2, -2], [4, 5]])
add_lines(m, curve, x, y)
m.optimize()
assert m.status == OptimizationStatus.OPTIMAL
assert (x.x, y.x) == (-1, 7)
show_model(m)

Output

\Problem name: 

Minimize
OBJROW: - y
Subject To
constr(0):  - x + w_0 + w_1 + w_2 = 2
constr(1):  - y + w_0 -3 w_1 + 3.50000 w_2 = -6
constr(2):  - w_0 + z_0 <= -0
constr(3):  w_0 <= 1
constr(4):  - w_1 + 3 z_1 <= -0
constr(5):  - w_1 + 3 z_0 >= -0
constr(6):  - w_2 + 2 z_1 >= -0
Bounds
 x Free
 0 <= z_0 <= 1
 0 <= z_1 <= 1
Integers
z_0 z_1 
End