utils: new function convert_to_numerical

[frodon1]

This new parameter allows to convert string values to numerical values.
This allow to consider 100 and '100' equal, or 100 and '101' with a tolerance parameter of 0.1 for instance.

[jirikuncar]

@frodon1 IMHO the convert parameter is a bit more controversial. Can you try to preprocess your dict before you pass it to diff function instead?

def my_convert(obj):
    if isinstance(obj, dict):
        return {key: my_convert(value) for key, value in obj.items()}
    elif isinstance(obj, (set, list)):
        return ([my_convert(value) for value in obj]
    elif isinstance(obj, str):
        return convert_to_numeric(obj)
    return obj

print(list(diff(my_convert(first), my_convert(second))))

[frodon1]

You are right, pre-processing the input dict is the right thing to do.
Actually it is what I did with my dict :).

[jirikuncar]

@frodon1 😊 can you close the PR?

[frodon1]

I changed the PR: i completed the convert_to_numeric function, removed the convert parameter and updated the tests. Is it OK for you ?

[frodon1]

@jirikuncar I close this PR and create another PR.