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fix: fix entropy patch for newer pydantic versions#132

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gyeongjae/pydantic-entropy-patch
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fix: fix entropy patch for newer pydantic versions#132
ryanking13 wants to merge 1 commit into
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gyeongjae/pydantic-entropy-patch

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@ryanking13

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Newer pydantic versions removed this function so using newer pydantic versions raises an error (e.g. in python 3.14 test envrionment)

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ask-bonk Bot commented Jun 19, 2026

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Now let me check if newer pydantic_core versions still make entropy calls during import (which might need a different patch), and also look at how other similar early-return patterns work in this file (like rust_package_context).

The change looks straightforward. Let me analyze it:

  1. What the PR does: When pydantic_core no longer exposes validate_core_schema (removed in newer versions), the patch context manager short-circuits with a bare yield instead of trying to call the removed function and crashing.

  2. Is this correct? The existing code does two things with entropy:

    • Allows 1 entropy call during import (yield inside allow_bad_entropy_calls(1))
    • Calls module.validate_core_schema(None) post-import to trigger another entropy call

    The early return skips both of these. The question is whether newer pydantic_core versions still make entropy calls during import. If they removed validate_core_schema, presumably the internal structure changed enough that neither entropy call is needed — otherwise the module would fail at import time regardless.

  3. Pattern consistency: The early-return pattern (yield + return) matches the existing rust_package_context pattern at lines 37-39, so it's idiomatic for this file.

  4. Comment accuracy: The comment says "Newer versions of pydantic_core don't have this function" — accurate but could mention that the entropy calls are also no longer needed for these versions. However, that's a minor nit and not actionable.

  5. hasattr check: This is the right approach — it's a runtime capability check rather than version pinning, which is more robust.

The fix is minimal, correct, and follows existing patterns. There are no logic bugs, security issues, backward compat concerns, or missing edge cases.

LGTM

github run

@ryanking13 ryanking13 marked this pull request as draft June 19, 2026 09:08
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Acutally, looks like this is more complicated than this.

@contextmanager
def pydantic_core_context(module):
if not hasattr(module, "validate_core_schema"):
# Newer versions of pydantic_core don't have this function

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Right you still need to call something that makes pydantic generate a hashmap so the hash seed gets initialized.

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