Traceback (most recent call last):
  File "/Users/magicliang/Desktop/Programming/git/hexo-blog/examples/system-design/labs/35/session-ticket/check_views.py", line 13, in <module>
    assert retry['state'] == 'EXPIRED', {'issue': 'expired retry displayed HELD', 'returned': retry}
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: {'issue': 'expired retry displayed HELD', 'returned': {'id': 'c02497e78c8443328da2f981cee34cf8', 'buyer': 'alice', 'request_key': 'same-key', 'seat_id': 1, 'hold_id': 'e9a3d66321694b678c51a8dd0385aaed', 'expires_at': 1300, 'state': 'HELD', 'amount_cents': 10000, 'currency': 'CNY'}}
