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Viewing changes to Lib/weave/dumb_shelve.py

  • Committer: Bazaar Package Importer
  • Author(s): Ondrej Certik
  • Date: 2008-06-16 22:58:01 UTC
  • mfrom: (2.1.24 intrepid)
  • Revision ID: james.westby@ubuntu.com-20080616225801-irdhrpcwiocfbcmt
Tags: 0.6.0-12
http://bugs.debian.org/489149
* The description updated to match the current SciPy (Closes: #489149).
* Standards-Version bumped to 3.8.0 (no action needed)
* Build-Depends: netcdf-dev changed to libnetcdf-dev

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Lib/weave/dumb_shelve.py
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from shelve import Shelf
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import zlib
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import cPickle
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import dumbdbm_patched
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class DbfilenameShelf(Shelf):
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    """Shelf implementation using the "anydbm" generic dbm interface.
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    This is initialized with the filename for the dbm database.
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    See the module's __doc__ string for an overview of the interface.
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    """
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    def __init__(self, filename, flag='c'):
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        Shelf.__init__(self, dumbdbm_patched.open(filename, flag))
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    def __getitem__(self, key):
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        compressed = self.dict[key]
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        try:
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            r = zlib.decompress(compressed)
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        except zlib.error:
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            r = compressed
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        return cPickle.loads(r)
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    def __setitem__(self, key, value):
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        s = cPickle.dumps(value,1)
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        self.dict[key] = zlib.compress(s)
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def open(filename, flag='c'):
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    """Open a persistent dictionary for reading and writing.
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    Argument is the filename for the dbm database.
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    See the module's __doc__ string for an overview of the interface.
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    """
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    return DbfilenameShelf(filename, flag)