Use python function/method within PuLP objective function

[Ervin66]

Would it be possible to define a cost function and use it while looping through the arguments within PuLP objective function?

example:

def func(a, b, c):
    return a * b * c

prob += pulp.lpSum([func( x[i], y[j], z[w])
                                  for i in I
                                  for j in J
                                  for w in W])

I tried implementing but it seems it is not taken into consideration by the model.

[pchtsp]

Hello, I do not understand what you want to do but I recommend you follow this guide to complete your question: https://coin-or.github.io/pulp/guides/how_to_debug.html

In case x, y or z are lists or dictionaries of variables, then no: you cannot multiply variables in pulp.

[tkralphs]

I guess maybe this is basically the same question as in #409.