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Python Library Reference

Previous: 3.14.1 Relationship to other Up: 3.14 pickle Next: 3.14.3 Usage

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3.14.2 Data stream format

The data format used by pickle is Python-specific. This has the advantage that there are no restrictions imposed by external standards such as XDR (which can't represent pointer sharing); however it means that non-Python programs may not be able to reconstruct pickled Python objects.

By default, the pickle data format uses a printable ASCII representation. This is slightly more voluminous than a binary representation. The big advantage of using printable ASCII (and of some other characteristics of pickle's representation) is that for debugging or recovery purposes it is possible for a human to read the pickled file with a standard text editor.

A binary format, which is slightly more efficient, can be chosen by specifying a true value for the bin argument to the Pickler constructor or the dump() and dumps() functions.

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Python Library Reference

Previous: 3.14.1 Relationship to other Up: 3.14 pickle Next: 3.14.3 Usage

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Release 2.2.3, documentation updated on 30 May 2003.