microsoft / microsoft/qlib

[question] why not droping duplicates such as save_new_companies function?

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Description

https://github.com/microsoft/qlib/blob/7d66e4b7882862ab3d72087ebfe9ca88e80b458a/scripts/data_collector/index.py#L228

shall we do it like this:
new_df = new_df.drop_duplicates([self.SYMBOL_FIELD_NAME]) ????

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Research direction

Start at scripts/data_collector/index.py around line 228 and inspect save_new_companies, especially how new_df and SYMBOL_FIELD_NAME are used. Determine whether duplicate symbols are invalid for this collector, then verify the decision against the surrounding data flow and any relevant tests; done means the duplicate-handling behavior is explicit and validated.

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Assessment

Tech stack
python
Domain
data-engineering
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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