Originally posted by: SystemAdmin

Hello,

I'm currently trying to solve a mixed integer programs with Python and CPLEX.
With the following code, I am able to solve my problem and I also get the correct result.

> import cplex
>
> c = cplex.Cplex()
> c.read("MasterBIP.txt")
> c.solve()
> x = c.solution.get_values()

In the output, I can see the elapsed time but since I want to solve the problem in a subroutine without output, I wanted to ask how I can access the solution time.

I am happy for every answer,
Best regards,
BobGr
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

If your CPLEX version is recent enough then the Cplex class has a method get_time() that returns a timestamp and you can get the solve time like this:

import cplex
 
c = cplex.Cplex()
c.read("MasterBIP.txt")
start = c.get_time()
c.solve()
end = c.get_time()
elapsed = end - start
x = c.solution.get_values()

In any case, Python has a time module that is more flexible, so you may want to use that instead.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

Thanks for your answer.

• My CPLEX version seems to to be old, since the get_time() is not available.
• I already know the time module, but I planned to use the CPLEX time.

Until I found a better solution, I will use the following workaround:

c.set_results_stream("Test.log")

From the "Test.log", I will read the necessary times-

Thank you for your help,
BobGr
#CPLEXOptimizers
#DecisionOptimization