community: change graph schema to yaml format

[dudizimber]

Description:

• Changed the graph schema format to yaml for better interpretation and token count.

Summary by CodeRabbit

• New Features

  • Enhanced the schema refresh functionality to output details in YAML format for better readability and structure.

• Refactor

  • Improved schema retrieval logic for nodes, edges, and relationships to enhance performance and maintainability.

[coderabbitai]

Walkthrough

The update to the falkordb_graph.py in the langchain_community library enhances the schema retrieval process for nodes, edges, and relationships. It introduces specific methods for dumping schema details and employs YAML for formatting the output. This refactoring makes the schema refresh operation more structured and readable.

Changes

File	Changes
.../graphs/falkordb_graph.py	Added methods for schema retrieval, updated refresh_schema to use YAML, refactored logic.

Poem

🐇🌟
In the burrows of code, where the data nodes lie,
A rabbit hopped in, with a twinkle in its eye.
"Let's tidy this graph, with YAML so neat,
Refresh and refactor, make old new and sweet!"
With a thump and a cheer, the schema took flight,
In the gleam of the code, all was set right. 🌟🐇

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Recent Review Details

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between e786da7 and 0767a3c.

Files selected for processing (1)

• libs/community/langchain_community/graphs/falkordb_graph.py (2 hunks)

Additional Context Used

Ruff (1)

libs/community/langchain_community/graphs/falkordb_graph.py (1)

1-10: Import block is un-sorted or un-formatted

Additional comments not posted (3)

libs/community/langchain_community/graphs/falkordb_graph.py (3)

1-5: > 📝 NOTE

This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [1-10]

Reorder imports to adhere to PEP8 guidelines.

- import warnings
- import yaml
+ import yaml
+ import warnings

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146-180: Add error handling and validation for query results in schema dumping methods.

Consider wrapping the database queries and result processing in try-except blocks to handle potential exceptions and validate the structure of the query results to ensure they meet expectations.

---

184-197: Optimize YAML dumping in refresh_schema to reduce redundancy.

Consider storing the YAML-formatted strings of node_properties, edges, and relationships in variables before constructing the final schema string to avoid redundant calls to yaml.dump.

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