Guidance for OP with multiple data fields to be processed

[yxdyc]

Search before continuing 先搜索，再继续

• I have searched the Data-Juicer issues and found no similar feature requests. 我已经搜索了 Data-Juicer 的 issue 列表但是没有发现类似的功能需求。

Description 描述

Currently, users may be confused about supporting multiple fields for a given OP. For example, developing a OP that processes both text_key="question" and text_key="answer".

Besides, we need to add some guidance about the type of text related keys, e.g., must be str, rather than a list or dict, for the sake of efficiency and coding convenience (implicit assumptions for all text-related OPs).

Use case 使用场景

related issue: #380

Additional 额外信息

No response

Are you willing to submit a PR for this feature? 您是否乐意为此功能提交一个 PR？

• Yes I'd like to help by submitting a PR! 是的！我愿意提供帮助并提交一个PR！

[github-actions]

This issue is marked as stale because there has been no activity for 21 days. Remove stale label or add new comments or this issue will be closed in 3 day.

[github-actions]

Close this stale issue.