Fix: correct the raise behavior of function j_loader

[kirk0830]

fix #4490

Summary by CodeRabbit

• Bug Fixes

  • Improved error handling for unsupported file types when loading files, providing clearer messages for JSON and YAML formats.

• Documentation

  • Updated error message in the documentation to specify that files must be either JSON or YAML/YML.

[coderabbitai]

📝 Walkthrough

Walkthrough

The changes modify the j_loader function in deepmd/common.py to improve error handling for file loading. The function now implements a more robust approach to loading JSON and YAML files by attempting to parse the file first as JSON, and if that fails, then trying YAML. Additionally, the error message for unsupported file types has been updated for clarity.

Changes

File	Change Summary
deepmd/common.py	Updated j_loader function to enhance error handling for unsupported file types and improve error messages.

Assessment against linked issues

Objective	Addressed	Explanation
Proper error handling for non-existing files [#4490]	❓	Cannot confirm from the provided diff if file existence is explicitly checked.
Clear error messaging for unsupported file types [#4490]	✅

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📜 Recent review details

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📥 Commits

Reviewing files that changed from the base of the PR and between 091dd02 and 74c617b.

📒 Files selected for processing (1)

• deepmd/common.py (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• deepmd/common.py

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

deepmd/common.py (1)

194-194: Enhance error message with file details.

Consider making the error message more helpful by including the file path and the specific parsing errors encountered.

-    raise TypeError("config file must be json, or yaml/yml")
+    raise TypeError(f"Failed to parse '{filepath}': file must be valid JSON or YAML/YML")

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between cfe17a3 and 091dd02.

📒 Files selected for processing (1)

• deepmd/common.py (1 hunks)

🔇 Additional comments (2)

deepmd/common.py (2)

175-175: LGTM: Docstring update is accurate and concise.

The error message in the docstring correctly reflects the function's behavior.

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179-193: LGTM: Robust error handling implementation.

The new implementation provides a clear and systematic approach to file loading, with good separation between JSON and YAML attempts. The comments effectively explain the error handling strategy.