重複チェックPython リスト

def has_duplicates(seq):
    return len(seq) != len(set(seq))

l = [3954, 3948, 3938, 3937, 3936, 3935, 3934, 3933, 3932, 3931, 3930, 3929, 3928, 3927, 3926, 3925, 3924, 3923, 3922, 3921,
3920, 3919, 3918, 3917, 3916, 3915, 3914, 3913, 3912, 3911, 3910, 3909, 3908, 3907, 3906, 3905, 3904, 3903, 3902, 3901,
3900, 3899, 3898, 3897, 3896, 3895, 3894, 3893, 3892, 3891, 3890, 3889, 3878, 3877, 3876, 3875, 3874, 3873, 3872, 3871,
3870, 3869, 3868, 3867, 3866, 3865, 3864, 3863, 3862, 3861, 3860, 3859, 3858, 3857, 3854, 3853, 3852, 3638, 3637, 3635,
3634, 3633, 3632, 2711, 2677, 2653, 1800, 1795, 578, 485, 451, 449, 372, 162, 161, 160, 154, 153, 151, 150,
149, 146, 142, 136, 85, 97, 91, 80]

print(has_duplicates(l))