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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 tangent_bundle(self):
 """The tangent bundle associated with `domain` using `partition`. The tangent bundle of a space ``X`` of functions ``R^d --> F`` can be interpreted as the space of vector-valued functions ``R^d --> F^d``. This space can be identified with the power space ``X^d`` as used in this implementation. """

        if self.ndim == 0:
            return ProductSpace(field=self.field)
        else:
            return ProductSpace(self, self.ndim)