feat(python): type meta encoding for python#2509
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chaokunyang merged 6 commits intoapache:mainfrom Aug 25, 2025
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) ## Why? implement meta share mode for pyfory, so the struct can add/delete fields and have inconsistent schema bettween serialization and deserialization ## What does this PR do? <!-- Describe the details of this PR. --> ## Related issues #2509 #1938 #2160 #2278 ## Does this PR introduce any user-facing change? <!-- If any user-facing interface changes, please [open an issue](https://github.com/apache/fory/issues/new/choose) describing the need to do so and update the document if necessary. Delete section if not applicable. --> - [ ] Does this PR introduce any public API change? - [ ] Does this PR introduce any binary protocol compatibility change? ## Benchmark <!-- When the PR has an impact on performance (if you don't know whether the PR will have an impact on performance, you can submit the PR first, and if it will have impact on performance, the code reviewer will explain it), be sure to attach a benchmark data here. Delete section if not applicable. -->
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#2602) ## Why? align java and python compatible mode serialization ## What does this PR do? <!-- Describe the details of this PR. --> ## Related issues #2509 #1938 #2160 #2278 #2593 ## Does this PR introduce any user-facing change? <!-- If any user-facing interface changes, please [open an issue](https://github.com/apache/fory/issues/new/choose) describing the need to do so and update the document if necessary. Delete section if not applicable. --> - [ ] Does this PR introduce any public API change? - [ ] Does this PR introduce any binary protocol compatibility change? ## Benchmark <!-- When the PR has an impact on performance (if you don't know whether the PR will have an impact on performance, you can submit the PR first, and if it will have impact on performance, the code reviewer will explain it), be sure to attach a benchmark data here. Delete section if not applicable. -->
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Why?
type forward/backward compatible serialization is critical for online service which different service update their data schema and deploy at different time. The schema is in an inconsistent state.
meta shared encoding can address this : https://fory.apache.org/docs/specification/fory_xlang_serialization_spec#type-def
What does this PR do?
Add type meta encoding for python to support type forward/backward compatible serialization.
Things not finished in this PR:
Those feature will be implemented in follow-up PRs.
Related issues
#1938
#2160
#2278
Does this PR introduce any user-facing change?
Benchmark