Make all Pipeline Parameters hashable

[lorenzwalthert]

Describe the feature you'd like

Certain operations in Python require hashable objects. While sagemaker.workflow.parameters.ParameterString is hashable, other data types such as ParameterInteger, ParameterBoolean or ParameterFloat are not hashable. To me, it's unclear why only string parameters should be washable, as the underlaying method __hash__(self) could apparently easily be implemented at the sagemaker.workflow.parameters.Parameter instead at sagemaker.workflow.parameters.ParameterString. Currently, it's implemented like this:

    class ParameterString(Parameter):
    # ... 
    def __hash__(self):
        """Hash function for parameter types"""
        return hash(tuple(self.to_request()))

How would this feature be used? Please describe.

Use non-string parameters in places where a hashable object is required, e.g. dict keys.

Describe alternatives you've considered

Use ParameterString everywhere, even when the underlaying data type is not actually a string.