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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def element(self, inp=None, cast=True):
 """Create an element in the product space. Parameters inp : optional If ``inp`` is ``None``, a new element is created from scratch by allocation in the spaces. If ``inp`` is already an element of this space, it is re-wrapped. Otherwise, a new element is created from the components by calling the ``element()`` methods in the component spaces. cast : bool, optional If ``True``, casting is allowed. Otherwise, a ``TypeError`` is raised for input that is not a sequence of elements of the spaces that make up this product space. Returns ------- element : `ProductSpaceElement` The new element Examples -------- True True Create an element of the product space ProductSpace(rn(2), rn(3)).element([ [ 1., 2.], [ 1., 2., 3.] ]) """

        # If data is given as keyword arg, prefer it over arg list
        if inp is None:
            inp = [space.element() for space in self.spaces]

        if inp in self:
            return inp

        if len(inp) != len(self):
            raise ValueError('length of `inp` {} does not match length of '
                             'space {}'.format(len(inp), len(self)))

        if (all(isinstance(v, LinearSpaceElement) and v.space == space
                for v, space in zip(inp, self.spaces))):
            parts = list(inp)
        elif cast:
            # Delegate constructors
            parts = [space.element(arg)
                     for arg, space in zip(inp, self.spaces)]
        else:
            raise TypeError('input {!r} not a sequence of elements of the '
                            'component spaces'.format(inp))

        return self.element_type(self, parts)