Returns a new DataSwim instance from a dataframe

def new_(self, df=pd.DataFrame(), db=None, quiet=False,
             nbload_libs=True):
        """
        Returns a new DataSwim instance from a dataframe
        """
        ds2 = Ds(df, db, nbload_libs)
        if quiet is False:
            self.ok("A new instance was created")
        return ds2