converting np float result to float in binary classification evaluator

[JINO-ROHIT]

Fixes #3075

A simple fix to change the result np.floats to float.

I had two options -

1. using .item()
2. using type cast float()

float() seemed slightly faster so i went with it.

Who can review
@tomaarsen

[tomaarsen]

I like float - it keeps working even if sklearn or something updates their output type from np.float32/np.float64 to regular float, unlike .item().

I'll try this out locally tomorrow morning I suspect, but it looks solid at a glance.

Thanks!

[tomaarsen]

Apologies for the delay!
I tested this locally and it works like a charm. Thanks for reporting @chr-werner and thanks for fixing @JINO-ROHIT!

• Tom Aarsen