Traceback (most recent call last):
  File "/Users/magicliang/Desktop/Programming/git/hexo-blog/examples/system-design/labs/35/session-dispatch/naive.py", line 39, in <module>
    reproduce()
    ~~~~~~~~~^^
  File "/Users/magicliang/Desktop/Programming/git/hexo-blog/examples/system-design/labs/35/session-dispatch/naive.py", line 35, in reproduce
    assert len(offers)<=1, 'one driver now has two valid offers'
           ^^^^^^^^^^^^^^
AssertionError: one driver now has two valid offers
