What do these lines do in the task?

Question

Python

The task in the picture is written and there are code comments, but they do
n’t
tell me what happens after
all explain it to another what is being done in this line. I don't need super analysis, just answers like: "pd.read_csv - opens a file."

Answer 1

Reformats the original data to the form of new data in order to merge them further
Che for the question? Converts data from a csv table to the desired format. What data in the table we do not know. What data should turn out - too.