Validation error messages refer to the super classes

[maximlt]

Validation code in a Parameter often calls the Parameter's parents validation methods. The Parameter name is hard-coded in the validation error message, which means that users may receive an error message that is a bit confusing as it doesn't mention the type of the invalid Parameter but the type of one of its parents.

This snippet emits ValueError: Tuple parameter 'r' only takes a tuple value, not <class 'str'>. while the Parameter is a Range. Range is indeed a subclass of Tuple.

import param

class P(param.Parameterized):
    r = param.Range()

P(r='test')

Substituting the hard-coded Parameter name with self.__class__.__name__ would probably fix that.

[maximlt]

Actually fixed in #808 🎉