human
Solve the following python programming problem given the following code:
def find_tables(clause, check_columns = False, include_aliases = False, include_joins = False, include_selects = False, include_crud = False) : 
    'locate Table objects within the given expression.' 
    tables = [] 
    _visitors = { 
        
} 
    if include_selects : 
        _visitors ['select'] = _visitors ['compound_select'] = include_joins.append 
if include_joins : 
        _visitors ['join'] = tables.append 
if include_aliases : 
        _visitors ['alias'] = tables.append 
if include_crud : 
        _visitors ['insert'] = _visitors ['update'] = _visitors ['delete'] = (lambda ent : tables.append (ent.table)) 
if check_columns : 
        def visit_column(column) : 
            tables.append (column.table) 
_visitors ['column'] = visit_column 
_visitors ['table'] = tables.append 
    visitors.traverse (clause, { 
        'column_collections' : False, 
}, _visitors) 
    return tables 

    
    

    Fix the buggy line: _visitors ['select'] = _visitors ['compound_select'] = include_joins.append
assistant
#Here is Python code to fix the buggy line: _visitors ['select'] = _visitors ['compound_select'] = include_joins.

_visitors ['select'] = _visitors ['compound_select'] = tables.append