Группировка по нескольким значениям

class Record
{
        public int i;
        public bool f;
        public string data;
        public Record(int _i, bool _f, string _data)
        {
                i = _i;
                f = _f;
                data = _data;
        }
}

public static void Main (string[] args)
{
        var array = new []
        {
                new Record(0, true, "A"),
                new Record(1, false, "B"),
                new Record(0, true, "C"),
                new Record(9, false, "D"),
                new Record(1, false, "E"),                      
        };
        
        var groups = from record in array
                                    group record by new { record.i, record.f };
        
        foreach (var g in groups)
                Console.WriteLine("i = {0}, f = {1}, records: {2}", g.Key.i, g.Key.f, string.Join(", ", g.Select(record=>record.data).ToArray()));              
}

i = 0, f = True, records: A, C
i = 1, f = False, records: B, E
i = 9, f = False, records: D

class Record:
    def __init__(self, i, f, data):
        self.i = i;
        self.f = f;
        self.data = data;
        
array = [Record(0, True, "A"),
         Record(1, False, "B"),
         Record(0, True, "C"),
         Record(9, False, "D"),
         Record(1, False, "E")]

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