Add defaultdict and Any to PYTHON_TYPE_IMPORTS

[koxudaxi]

Summary by CodeRabbit

• New Features
  • Expanded Python type support in code generation to include defaultdict and Any types with automatic import handling.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

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📥 Commits

Reviewing files that changed from the base of the PR and between e6eb1b5 and e7ab5cb.

⛔ Files ignored due to path filters (1)

• tests/data/jsonschema/x_python_type_dynamic_resolve.json is excluded by !tests/data/**/*.json and included by none

📒 Files selected for processing (4)

• docs/python-model.md
• src/datamodel_code_generator/parser/jsonschema.py
• tests/data/expected/main/jsonschema/x_python_type_dynamic_resolve.py
• tests/main/jsonschema/test_main_jsonschema.py

📝 Walkthrough

Walkthrough

Two new Python type imports are added to the JsonSchemaParser.PYTHON_TYPE_IMPORTS mapping: defaultdict from the collections module and Any from the typing module. This expands the explicit type imports available for generated code.

Changes

Cohort / File(s)	Summary
Python Type Imports Expansion src/datamodel_code_generator/parser/jsonschema.py	Added two new entries to PYTHON_TYPE_IMPORTS class variable: "defaultdict" → Import.from_full_path("collections.defaultdict") and "Any" → Import.from_full_path("typing.Any")

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• Support incompatible Python types in x-python-type extension #2841: Also modifies JsonSchemaParser.PYTHON_TYPE_IMPORTS to add type import entries for generated code, directly related to this change.

Poem

🐰 A rabbit's ode to typing's grace,
Defaultdict and Any find their place,
In imports neat, so clean and bright,
The code hops on with perfect type! ✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly and concisely describes the main change: adding defaultdict and Any to PYTHON_TYPE_IMPORTS, which matches the actual modifications in the JsonSchemaParser class.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[github-actions]

📚 Docs Preview: https://pr-2860.datamodel-code-generator.pages.dev

[codspeed-hq]

CodSpeed Performance Report

Merging #2860 will not alter performance

_{Comparing fix/defaultdict-any-import (e7ab5cb) with main (8c7a9b2)}

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

Summary

✅ 11 untouched
⏩ 98 skipped¹

Footnotes

1. 98 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.52%. Comparing base (63d8804) to head (e7ab5cb).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2860   +/-   ##
=======================================
  Coverage   99.52%   99.52%           
=======================================
  Files          90       90           
  Lines       14938    14958   +20     
  Branches     1788     1791    +3     
=======================================
+ Hits        14867    14887   +20     
  Misses         38       38           
  Partials       33       33           

Flag	Coverage Δ
unittests	99.52% <100.00%> (+<0.01%)	⬆️

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[github-actions]

Breaking Change Analysis

Result: No breaking changes detected

Reasoning: This PR is purely additive - it expands the PYTHON_TYPE_IMPORTS dictionary with additional types (defaultdict, Any, Mapping, Sequence, Path, UUID, datetime, etc.) and adds a dynamic fallback mechanism for types not in the static mapping. All previously supported types continue to work identically. The changes only add support for additional types in x-python-type, meaning schemas that previously would have generated incomplete imports now generate correct imports. This is a feature enhancement/bug fix, not a breaking change.

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This analysis was performed by Claude Code Action

[github-actions]

🎉 Released in 0.51.0

This PR is now available in the latest release. See the release notes for details.