How to Group and Concatenate Values in Pandas: Two Simple Methods
This article shows how to use Pandas to group rows by multiple columns, collect the values of another column into a list, and then join them into a comma‑separated string, providing two concise code solutions and a performance comparison.
Conclusion
The article presented a real‑world Pandas grouping problem, offered two working code snippets, and highlighted significant speed gains when optimizing the operation. Thanks to the community members who asked the question and contributed solutions.
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