Validation check problem with custom exceptions

[char-pap]

There is a problem occuring with the validation checker. The current one:

def _check_validatation_data(self, data):
        detail_key = "detail"  
        if detail_key in data:  
            return False  
        return True

checks only for 'detail' inside the data and this creates a problem when a custom exception handling exists or even if some response actually has the key "detail" inside.

Proposal: Validate via the response status code. If it is in the range of HTTP 2xx it's True.