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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 to_float(self, col: str, **kwargs):
 """ Convert colums values to float :param col: name of the colum :type col: str, at least one :param \*\*kwargs: keyword arguments for ``df.astype`` :type \*\*kwargs: optional :example: ``ds.to_float("mycol1")`` """

        try:
            self.df[col] = self.df[col].astype(np.float64, **kwargs)
            self.ok("Converted column values to float")
        except Exception as e:
            self.err(e, "Error converting to float")