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improve linear examples

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This commit is contained in:
lperron@google.com
2011-12-05 14:15:20 +00:00
parent e6b1c2755f
commit 40e673cb15
2 changed files with 34 additions and 23 deletions
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25
python/linear_programming.py
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@@ -21,9 +21,9 @@ from google.apputils import app
from linear_solver import pywraplp
def RunLinearExampleAlgebraicAPI(optimization_problem_type):
def RunLinearExampleNaturalLanguageAPI(optimization_problem_type):
"""Example of simple linear program with natural language API."""
solver = pywraplp.Solver('RunLinearExampleAlgebraicAPI',
solver = pywraplp.Solver('RunLinearExampleNaturalLanguageAPI',
optimization_problem_type)
infinity = solver.infinity()
# x1, x2 and x3 are continuous non-negative variables.
@@ -107,26 +107,31 @@ def SolveAndPrint(solver, variable_list, constraint_list):
(i, constraint.dual_value(), constraint.activity()))
def RunAllLinearExampleAlgebraicAPI():
def Announce(solver, api_type):
print ('---- Linear programming example with ' + solver + ' (' +
api_type + ') -----')
def RunAllLinearExampleNaturalLanguageAPI():
if hasattr(pywraplp.Solver, 'GLPK_LINEAR_PROGRAMMING'):
print '---- Linear programming example with GLPK (algebraic API) ----'
RunLinearExampleAlgebraicAPI(pywraplp.Solver.GLPK_LINEAR_PROGRAMMING)
Announce('GLPK', 'natural language API')
RunLinearExampleNaturalLanguageAPI(pywraplp.Solver.GLPK_LINEAR_PROGRAMMING)
if hasattr(pywraplp.Solver, 'CLP_LINEAR_PROGRAMMING'):
print '---- Linear programming example with CLP (algebraic API) ----'
RunLinearExampleAlgebraicAPI(pywraplp.Solver.CLP_LINEAR_PROGRAMMING)
Announce('CLP', 'natural language API')
RunLinearExampleNaturalLanguageAPI(pywraplp.Solver.CLP_LINEAR_PROGRAMMING)
def RunAllLinearExampleCppStyleAPI():
if hasattr(pywraplp.Solver, 'GLPK_LINEAR_PROGRAMMING'):
print '---- Linear programming example with GLPK (C++ style API) ----'
Announce('GLPK', 'C++ style API')
RunLinearExampleCppStyleAPI(pywraplp.Solver.GLPK_LINEAR_PROGRAMMING)
if hasattr(pywraplp.Solver, 'CLP_LINEAR_PROGRAMMING'):
print '---- Linear programming example with CLP (C++ style API) ----'
Announce('CLP', 'C++ style API')
RunLinearExampleCppStyleAPI(pywraplp.Solver.CLP_LINEAR_PROGRAMMING)
def main(unused_argv):
RunAllLinearExampleAlgebraicAPI()
RunAllLinearExampleNaturalLanguageAPI()
RunAllLinearExampleCppStyleAPI()