Store a set in a dictionary's value

[deanhystad]

I have to read a file that contains a chronological list of the world series winning teams from 1903 to 2009

Who won in 1994?

First make sure you want a set instead of a list. A set is an unordered collection, and I think I would prefer my years to appear in order (probably is sorted in the data). Then I would use something like bowlofred does, except use .append() instead of .add().

I grabbed a list from the Encyclopedia Britannica website that looks like this

Output:
1903	Boston Americans (AL)	Pittsburgh Pirates (NL)	5–3
1904	no series		
1905	New York Giants (NL)	Philadelphia Athletics (AL)	4–1
1906	Chicago White Sox (AL)	Chicago Cubs (NL)	4–2

To stuff this into a dictionary I used this code:

with open('debug.txt', 'r') as file:
    ws_winner = {}
    while line := file.readline():
        try:
            year, winner, loser, score = line.strip().split('\t')
            winner = winner[:-5]
            year = int(year)
            if years := ws_winner.get(winner):
                years.append(year)
            else:
                ws_winner[winner] = [year]
        except:
            pass

for team, years in ws_winner.items():
    print(team, years)