Data frame snapshots #62835
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Data frame snapshots #62835
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This pull request introduces a new snapshot feature for pandas DataFrames, allowing users to create, restore, list, drop, and clear named snapshots of a DataFrame's state. The implementation includes a per-DataFrame snapshot store, deep copy safety, and comprehensive tests for all new functionality.
New DataFrame snapshot functionality:
DataFramefor snapshot management:snapshot,restore,list_snapshots,drop_snapshot,clear_snapshots, andsnapshot_info. These allow users to save and revert to previous states of a DataFrame, as well as manage snapshots.DataFrameSnapshotStoreclass in the new filepandas/core/frame_versioning.py, which handles the storage, retrieval, and metadata of DataFrame snapshots using deep copies for safety._ensure_snapshot_storeto attach and manage the snapshot store per DataFrame instance.pandas/tests/frame/test_versioning.pyto verify snapshot creation, restoration, inplace mutation, deletion, clearing, copy behavior, and error handling for missing snapshots.Integration and usage example:
asv_bench/benchmarks/bench_snapshot_memory.pydemonstrating how to create a snapshot and inspect memory usage, showcasing the new API in practice.