Check column for variable and get value from another column in matched row

How can I get the values of one column in a csv-file by matching attributes in another column? CSV-file would look like that: One,Two,Three x,car,5 x,bus,7 x,car,9 x,car,6 I only want to get the …

Calculating the sum of the quantities of one dataframe based on dates in another dataframe (Python)

Suppose I have a first df like this: df1: item date1 date2 1 2020-06-21 2020-06-28 2 2020-05-13 2020-05-24 3 2020-06-20 2020-06-28 I also have a second df (df2)…

extract new columns and fill values based on categorical values data frame in python

I have a data frame where one column is categorical strings and the next one is the values corresponding to it: df = pd.DataFrame(list(([‘a’, ‘b’, ‘c’, ‘buy’, 5], [‘f’, ‘b’, ‘a’, …

How can I group by two columns interchangeably?

How can I group by two columns interchangeably? For example, if I have this table and I want to get However, I get this instead when I use df.insert(2, ‘Count’, df.groupby([‘Name1′,’Name2’])[‘Name1’]…