melt

Pandas DataFrame stack multiple column values into single column Question: Assuming the following DataFrame: key.0 key.1 key.2 topic 1 abc def ghi 8 2 xab xcd xef 9 How can I combine the values of all the key.* columns into a single column ‘key’, that’s associated with the topic value corresponding to the key.* columns? …

Opposite of melt in python pandas Question: I cannot figure out how to do "reverse melt" using Pandas in python. This is my starting data label type value 0 x a 1 1 x b 2 2 x c 3 3 y a 4 4 y b 5 5 y c 6 6 z a …