def exact(self, column, *values):
        """
        Sets the main dataframe to rows that has the exact string
        value in a column
        """
        df = self._exact(column, *values)
        if df is None:
            self.err("Can not select exact data")
        self.df = df
def exact ( self , column , * values ) : df = self . _exact ( column , * values ) if df is None : self . err ( "Can not select exact data" ) self . df = df
Sets the main dataframe to rows that has the exact string
        value in a column