1) Exc
Per the documentation, there is no support for what you are trying to do. You can select columns by column number or column name, but not by column label:
parse_cols : int or list, default None
If None then parse all columns,
If int then indicates last column to be parsed
If list of ints then indicates list of column numbers to be parsed
If string then indicates comma separated list of column names and column ranges (e.g. “A:E” or “A,C,E:F”)