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create new column based on weekly change, based on ID

JavaScript

I have the above data for 1 month and I want to create a new column delta_rank_7 which tells me the change in rank in last 7 days for each id (NaNs for 2021-06-01 to 2021-06-07)

I can do something like mentioned here Calculating difference between two rows in Python / Pandas

JavaScript

but I have multiple entries for each date and I want to do this for each id.

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Answer

If there are duplicated id use:

JavaScript

If need differencies by 7 days use DataFrameGroupBy.shift and subtract:

JavaScript
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