human
Solve the following python programming problem given the following code:
def _bulk_update(mapper, mappings, session_transaction, isstates, update_changed_only) : 
    base_mapper = mapper.base_mapper 
    cached_connections = _cached_connection_dict (base_mapper) 
    def _changed_dict(mapper, state) : 
        return dict (((k, v) for (k, v) in state.dict.items () if ((k in state.committed_state) or (k in mapper._primary_key_propkeys)))) 
if isstates : 
        if update_changed_only : 
            mappings = [_changed_dict (mapper, state) for state in mappings] 
else : 
            mappings = [state.dict for state in mappings] 
else : 
        mappings = list (mappings) 
if session_transaction.session.connection_callable : 
        raise NotImplementedError ('connection_callable / per-instance sharding not supported in bulk_update()') 
connection = session_transaction.connection (base_mapper) 
    for (table, super_mapper) in base_mapper._sorted_tables.items () : 
        if (not mapper.isa (super_mapper)) : 
            continue 
records = _collect_update_commands (None, table, ((None, mapping, mapper, connection, (mapping [mapper._version_id_prop.key] if mapper._version_id_prop else None)) for mapping in mappings), bulk = True) 
        _emit_update_statements (base_mapper, None, cached_connections, super_mapper, super_mapper, records, bookkeeping = False) 

    
    

    Fix the buggy line: _emit_update_statements (base_mapper, None, cached_connections, super_mapper, super_mapper, records, bookkeeping = False)
assistant
#Here is Python program to fix the buggy line: _emit_update_statements (base_mapper, None, cached_connections, super_mapper, super_mapper, records, bookkeeping = False)
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_emit_update_statements (base_mapper, None, cached_connections, super_mapper, table, records, bookkeeping = False)