How to create a new column based on minimum value from another column

Question

I have a dataframe with a lot of columns and rows (> 10000), but I need to create a column based on the minimum value from another one

Example dataframe:

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So, I need the column "Cantidad min" to contain the minimum value for that group of "CodProducto":

Example:

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How can I do in python?

Answer 1

Please try follow one.

dataframe["Cantidad min"] = df.groupby(dataframe)["CodProducto"].min()

I can't test this code on your data because you didn't share yours. If it doesn't works, please provide me your data as .csv format.