block4.python

def opponent_games(df, team, gameids):
    """
    Returns opponents for a given team.

    Arguments:

    df: the dataframe containing the data.
    team: the team you are interested in.
    games: a array of gameids the team played in.
    """
    games = df[df.gameid.isin(gameids)]
    opponent_games = games[games.team != team].drop_duplicates(subset=['gameid'])[['gameid', 'team']]
    opponent_games.columns = ['gameid', 'opponent']

    return opponent_games