def solve_least_squares(self, rhs, method='CH'):
        if method == 'CH':
            return self.cholesky_solve(rhs)
        t = self.T
        return (t*self).inv(method=method)*t*rhs
Tests tokenize_reviews_mapper to make sure it is properly running
dataset/ETHPy150Open sympy/sympy/sympy/matrices/matrices.py/MatrixBase.solve_least_squares--crossover with--dataset/ETHPy150Open Yelp/dataset-examples/test/test_category_predictor.py/TestCategoryPredictor.test_tokenize_reviews