I cannot see any reason for the pandas tag to exist on CV. It would seem this is very specifically about code, and not directly statistical/ML code.
But I've never used pandas.
One point I did not make clear enough in the original post is that, as far as I know,
pandas is not a package containing any implementation of statistical methodology (or machine learning); it's just a commonly used tool for storing and organizing data. It is my understanding that a question about, say,
scikit-learn could easily be on topic, especially if the question focused on the statistical methodology behind the tools in the package. But it seems like a question about SQL is almost surely off topic. For me, a tag like pandas is much closer to sql than it is to scikit-learn.
pandas does more than I recognize?