Rename CHATGPT_API_KEY to OPENAI_API_KEY

[senthilkumaranT]

Refactor: OpenAI API Key Naming Standard. "CHATGPT_API_KEY" (Issue #152)

Overview

This update standardizes the API key naming convention within the PageIndex framework. To align with industry standards and the official OpenAI environment variable naming, all instances of CHATGPT_API_KEY have been migrated to OPENAI_API_KEY.

🛠️ Changes

1. Source Code (pageindex/utils.py)

• Variable Rename: Updated the global configuration constant from CHATGPT_API_KEY to OPENAI_API_KEY.
• Environment Retrieval: Now fetches the key using os.getenv("OPENAI_API_KEY").
• Function Defaults: Updated signature defaults for:
  • ChatGPT_API_with_finish_reason(...)
  • ChatGPT_API(...)
  • ChatGPT_API_async(...)

2. Documentation (README.md)

• Setup Instructions: Updated the .env configuration example to guide users to use OPENAI_API_KEY for local setup.

How to Update

If you previously had a .env file, please update your variable name:

Old:

CHATGPT_API_KEY=sk-...