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Viewing changes to HACKING

Committer: Martin Pool
Date: 2005-11-02 22:57:39 UTC
mfrom: (1185.30.1)
mto: (1185.66.1 bzr.revision-storage) (1505.1.18 bound-branch) (1508.1.15) (1526.1.3 run_tests_twice_for_i18n) (1540.1.3 bzr.dev (Main development branch)) (1685.1.1 bzr-encoding) (1534.1.1 integration) (1553.5.1 bzr.dev (Main development branch)) (1608.2.1 bzr.mbp.escape-stores)
mto: This revision was merged to the branch mainline in revision 1505.
Revision ID: mbp@sourcefrog.net-20051102225739-61d26622f1f95284

Improved description of python exception policies

added added

removed removed

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Destructors

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-----------

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Python destructors (``__del__``) work rather differently from in other

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languages. In particular, bear in mind that destructors may not be called

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immediately when the object apparently becomes unreferenced, and that

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there are tight restrictions on what can be done inside them.

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Python destructors (``__del__``) work differently to those of other

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languages. In particular, bear in mind that destructors may be called

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immediately when the object apparently becomes unreferenced, or at some

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later time, or possibly never at all. Therefore we have restrictions on

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what can be done inside them.

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0. Never use a __del__ method without asking Martin/Robert first.

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