How to use the confuse.templates.Choice function in confuse

# Dictionaries work as templates.
        return MappingTemplate(value)
    elif value is int:
        return Integer()
    elif isinstance(value, int):
        return Integer(value)
    elif isinstance(value, type) and issubclass(value, util.BASESTRING):
        return String()
    elif isinstance(value, util.BASESTRING):
        return String(value)
    elif isinstance(value, set):
        # convert to list to avoid hash related problems
        return Choice(list(value))
    elif (SUPPORTS_ENUM and isinstance(value, type)
            and issubclass(value, enum.Enum)):
        return Choice(value)
    elif isinstance(value, list):
        return OneOf(value)
    elif value is float:
        return Number()
    elif isinstance(value, float):
        return Number(value)
    elif value is None:
        return Template(None)
    elif value is REQUIRED:
        return Template()
    elif value is dict:
        return TypeTemplate(abc.Mapping)
    elif value is list:
        return TypeTemplate(abc.Sequence)
    elif isinstance(value, type):
        return TypeTemplate(value)

# If it's already a Template, pass it through.
        return value
    elif isinstance(value, abc.Mapping):
        # Dictionaries work as templates.
        return MappingTemplate(value)
    elif value is int:
        return Integer()
    elif isinstance(value, int):
        return Integer(value)
    elif isinstance(value, type) and issubclass(value, util.BASESTRING):
        return String()
    elif isinstance(value, util.BASESTRING):
        return String(value)
    elif isinstance(value, set):
        # convert to list to avoid hash related problems
        return Choice(list(value))
    elif (SUPPORTS_ENUM and isinstance(value, type)
            and issubclass(value, enum.Enum)):
        return Choice(value)
    elif isinstance(value, list):
        return OneOf(value)
    elif value is float:
        return Number()
    elif isinstance(value, float):
        return Number(value)
    elif value is None:
        return Template(None)
    elif value is REQUIRED:
        return Template()
    elif value is dict:
        return TypeTemplate(abc.Mapping)
    elif value is list:

def as_choice(self, choices):
        """Get the value from a list of choices. Equivalent to
        `get(Choice(choices))`.
        """
        return self.get(templates.Choice(choices))

def __init__(self, choices, default=REQUIRED):
        """Create a template that validates any of the values from the
        iterable `choices`.

        If `choices` is a map, then the corresponding value is emitted.
        Otherwise, the value itself is emitted.

        If `choices` is a `Enum`, then the enum entry with the value is
        emitted.
        """
        super(Choice, self).__init__(default)
        self.choices = choices