DantzigPivot

As a part of cylp.python.pivots it implements Dantzig’s Classical Simplex pivot rule. Although it already exists in CLP, for testing purposes we implement one in Python.

class cylp.py.pivots.DantzigPivot.DantzigPivot(clpModel)

Dantzig’s pivot rule implementation.

Usage

>>> from cylp.cy import CyClpSimplex
>>> from cylp.py.pivots import DantzigPivot
>>> from cylp.py.pivots.DantzigPivot import getMpsExample
>>> # Get the path to a sample mps file
>>> f = getMpsExample()
>>> s = CyClpSimplex()
>>> s.readMps(f)  # Returns 0 if OK
0
>>> pivot = DantzigPivot(s)
>>> s.setPivotMethod(pivot)
>>> s.primal()
'optimal'
>>> round(s.objectiveValue, 5)
2520.57174