if(temp_similarity[k]==similarity[l]): ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

I am trying to compare the 2 values from the indexes of two different numpy arrays as below:

if(temp_similarity[k]==similarity[l]):
    sum = sum+probabilities_train[l]
    break

but i found the following error?

if(temp_similarity[k]==similarity[l]):

ValueError: The truth value of an array with more than one element is ambiguous.
            Use a.any() or a.all()

Please help me in this regards???