Returns a list of random, non-unique elements from a passed object.

        If `elements` is a dictionary, the value will be used as
        a weighting element. For example::

            random_element({"{{variable_1}}": 0.5, "{{variable_2}}": 0.2, "{{variable_3}}": 0.2, "{{variable_4}}": 0.1})

        will have the following distribution:
            * `variable_1`: 50% probability
            * `variable_2`: 20% probability
            * `variable_3`: 20% probability
            * `variable_4`: 10% probability

def random_choices(self, elements=('a', 'b', 'c'), length=None):
        """
        Returns a list of random, non-unique elements from a passed object.

        If `elements` is a dictionary, the value will be used as
        a weighting element. For example::

            random_element({"{{variable_1}}": 0.5, "{{variable_2}}": 0.2, "{{variable_3}}": 0.2, "{{variable_4}}": 0.1})

        will have the following distribution:
            * `variable_1`: 50% probability
            * `variable_2`: 20% probability
            * `variable_3`: 20% probability
            * `variable_4`: 10% probability

        """
        return self.random_elements(elements, length, unique=False)