Re: [Sqlalchemy-tickets] [sqlalchemy] #2794: CircularDependencyError with jython because WeakSequence doesn't preserve order

[sqlalchemy <mi...@zz...>]

#2794: CircularDependencyError with jython because WeakSequence doesn't preserve
order
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      Reporter:  sayap     |      Owner:  zzzeek
          Type:  defect    |     Status:  new
      Priority:  highest   |  Milestone:  0.8.xx
     Component:  utils     |   Severity:  trivial - <10 minutes
    Resolution:            |   Keywords:
Progress State:  in queue  |
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Comment (by sayap):

 Yeah. It looks like because an integer always hashes to itself, a dict in
 cpython with keys in sequential integers (and inserted in the same order)
 will always have its ordering "preserved".

 Meanwhile, in the Javaland, while an integer still hashes to itself, a Map
 would perform another hash function to determine the final hash key, so
 the ordering become rather random.

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Ticket URL: <http://www.sqlalchemy.org/trac/ticket/2794#comment:6>
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