RuntimeWarning: overflow encountered in double_scalars

[Nicola Menga]

Hi I'm new on deap, I'm getting this error during the evolution of a genetic program script: "RuntimeWarning: overflow encountered in double_scalars       return left * right"

Can you help please? Thanks in advance!!

I defined a function for multiplication in this way:

def protectedMul(left, right):
    try:
        return left * right
    except OverflowError or ZeroDivisionError or FloatingPointError:
        print(left, right)
        return 1

[Marc-André Gardner]

Hi Nicola,

Well I cannot tell why you get these overflow errors, but the reason why you're not able to catch them is because your syntax is wrong. You should not use "except A or B or C", but "except (A, B, C)", as outlined in the Python doc : https://docs.python.org/3/tutorial/errors.html#handling-exceptions

Also, to get overflow on doubles, you need to have huge numbers, it would be important to check where they are coming from, assuming it is not a single, isolated case.

Marc-Andre

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[Nicola Menga]

Ooh thank you so much, now it works well!!! I've lost 5 hours of my life that no one will give me back but I learned an important thing: to read carefully the Python doc!!!

Thank you again! Have a nice day

On Thursday, 6 June 2019 20:27:38 UTC+1, Marc-André Gardner wrote:

Hi Nicola,

Well I cannot tell why you get these overflow errors, but the reason why you're not able to catch them is because your syntax is wrong. You should not use "except A or B or C", but "except (A, B, C)", as outlined in the Python doc : https://docs.python.org/3/tutorial/errors.html#handling-exceptions

Also, to get overflow on doubles, you need to have huge numbers, it would be important to check where they are coming from, assuming it is not a single, isolated case.

Marc-Andre

On 2019-06-06 13:33, Nicola Menga wrote:

Hi I'm new on deap, I'm getting this error during the evolution of a genetic program script: "RuntimeWarning: overflow encountered in double_scalars       return left * right"

Can you help please? Thanks in advance!!

I defined a function for multiplication in this way:

def protectedMul(left, right):
    try:
        return left * right
    except OverflowError or ZeroDivisionError or FloatingPointError:
        print(left, right)
        return 1

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