Pandas groupby sum vs count. Parameters: funcfunction, str, list, dict or None Function to use for aggregating the data. So when you do df. Computed sum of values within each group. If a function, must either work when passed a DataFrame or when passed to DataFrame. Example 1: In this example, we separately count occurrences of all the columns present in a dataset. DataFrameGroupBy. Several examples will explain how to group by and apply statistical functions like: sum, count, mean etc. Jul 23, 2025 · GroupBy is a pretty simple concept. apply Feb 13, 2018 · USA 201409 19 12 5 2 UK 201409 20 10 5 1 Canada 201411 15 10 5 1 I have tried different variations of groupby, sum and count functions of pandas but I am unable to figure out how to apply groupby sum and count all together to give the result as shown. By the end of this tutorial, you’ll have learned how the Pandas . rnzh o47a nost81i nexe fl9geqg ccg ht euiy ur 5f0w