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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 norm(self, x):
 """Calculate the norm of an element. This is the standard implementation using `inner`. Subclasses should override it for optimization purposes. Parameters x1 : `LinearSpaceElement` Element whose norm is calculated. Returns ------- norm : float The norm of the element. """

        return float(np.sqrt(self.inner(x, x).real))