def METHOD_NAME(self):
    """
    Execute the where clause of the query.
    """
    if len(self.where_conditions) > 0:
        for condition in self.where_conditions:
            column = condition[1]
            operator = '==' if condition[0] == '=' else condition[0]
            value = f"'{condition[2]}'" if type(condition[2]) == str else condition[2]
            query = f"{column} {operator} {value}"
            self.df.query(query, inplace=True)