unorderable type

[SadeghRahmaniB]

hello dear friend
i am using your code, and i thanks to you for this.
but i have an error that is related to heapify or heappush function in cvrp_advancedga.py file that error is:
"unorderable types: Solution() < Solution()"
and should i say that this error happend some time, not all the time
what should i do for solving that??

[cmanny]

Hi Dante,
Can you tell me any more information such as:

• python version
• how long after running the error occurs

The error suggests that the heap sorting mechanism is sorting on the Solution object rather than the cost, i.e it should always be (solution.cost, solution)

You could try to catch the error with

try:
    heapify(self.chromosomes)
except TypeError:
    print(self.chromosomes)

so that you can inspect the cause of the exception

[SadeghRahmaniB]

first of all, thank you for your suggestion,
error solved (except one time that the same error occur for heappush)
my python version is 3.4.0
and the error occurred in different times, sometimes before any iter, sometimes after some iter and sometimes no error occurred
i appreciate for your fast reply.