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Helper to check if ZODB is Python 3 ready by displaying binary fields that might need conversion to unicode.

Project description Documentation Status PyPI Python versions

zodb.py3migrate - ZODB and Python 3

If you have a ZODB database written using Python 2.x this package helps you to get your database ready for using it with Python 3. It is able to:

  • display objects which need to be converted,

  • do most of the the conversion for you,

  • and switch the database file to be readable in a process running Python 3.

This package is compatible with Python version 2.7.

The documentation is at



gocept <>

Online documentation:

PyPI page:


Source code:

Current change log:

Change log

0.6 (2018-06-05)

  • Update requirements to ZODB >= 4 as with an older version the migration cannot be done successfully. (#13)

0.5 (2017-01-17)

  • Release as wheel and include all files in release.

  • Ensure compatibility with setuptools >= 30.

0.4 (2016-10-29)

  • Fix brown bag release.

0.3 (2016-10-29)

  • Fixes for issues #4 and #5: Converted ZODB ist now actually saved, using additional subtransactions improves the memory footprint.

0.2 (2016-06-08)

  • Split up the two functions previously united in the script bin/zodb-py3migrate into bin/zodb-py3migrate-analyze resp. bin/zodb-py3migrate-convert.

  • Add new options to the analysis script:

    • --start to start the analysis with a predefined OID.

    • --limit to stop the analysis after a certain amount of seen OIDs.

0.1 (2016-05-19)

  • Initial release.

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