atom feed13 messages in org.python.python-dev[Python-Dev] object equality vs ident...
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Samuele Pedroni" <pedroni@inf.ethz.ch (Samuele Pedroni)Jan 3, 2002 8:43 am 
Samuele Pedroni" <pedroni@inf.ethz.ch (Samuele Pedroni)Jan 3, 2002 8:50 am 
Martin v. LoewisJan 3, 2002 2:56 pm 
Samuele Pedroni" <pedroni@inf.ethz.ch (Samuele Pedroni)Jan 3, 2002 4:49 pm 
Martin v. LoewisJan 3, 2002 5:39 pm 
Samuele Pedroni" <pedroni@inf.ethz.ch (Samuele Pedroni)Jan 3, 2002 6:10 pm 
Tim PetersJan 3, 2002 6:59 pm 
Samuele Pedroni" <pedroni@inf.ethz.ch (Samuele Pedroni)Jan 3, 2002 7:10 pm 
Samuele Pedroni" <pedroni@inf.ethz.ch (Samuele Pedroni)Jan 3, 2002 7:32 pm 
Aahz MaruchJan 4, 2002 1:00 pm 
Martin v. LoewisJan 4, 2002 1:39 pm 
Samuele Pedroni" <pedroni@inf.ethz.ch (Samuele Pedroni)Jan 4, 2002 1:54 pm 
Finn BockJan 4, 2002 2:11 pm 
Subject:[Python-Dev] object equality vs identity, in and dicts idioms and speed
From:Tim Peters (tim.@home.com)
Date:Jan 3, 2002 6:59:46 pm
List:org.python.python-dev

[Samuele Pedroni]

... but mmh ... id is broken under jython (that means different objects can get the same id :( ) , also in 2.1 final. It is a long-standing bug and yes we are about to solve it but there is a trade-off and jython id will become precise but many times slower wrt to CPython version (we need to implement a weak-key-table :( ).

Mapping what to what? A fine implementation of id() would be to hand each new object a unique Java int from a global counter, incremented once per Python object creation -- or a Java long if any JVM stays up long enough that 32 bits is an issue <wink>.