pydicom 2.2.0
Some of the updates in pydicom 2.2.0 include:
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a command-line interface was added with subcommands 'show' and 'codify'.
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improvements or new methods for private tags, JSON handling, FileSets, and VRs of AT, DS, and PersonName.
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improvements in color space conversion and RLE encoding/decoding.
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Data dictionaries were updated to version 2021b of the DICOM Standard
There were many bug fixes and other changes; see the release notes for full details of changes, additions, and bug fixes.