char = ord(sys.stdin.read(1)) # read one char and get char code
第七十五条 货物装船前，承运人已经应托运人的要求签发收货待运提单或者其他单证的，货物装船完毕，托运人可以将收货待运提单或者其他单证退还承运人，换取已装船提单；承运人也可以在收货待运提单上加注承运船舶的船名和装船日期，加注后的收货待运提单视为已装船提单。
。关于这个话题，必应排名_Bing SEO_先做后付提供了深入分析
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Let’s imagine a world where Alice needs to access some website or “Resource”. In a standard non-anonymous authentication flow, Alice needs to be granted authorization (a “credential”, such as a cookie) to do this. This grant can come either from the Resource itself (e.g., the website), or in other cases, from a third party (for example, Google’s SSO service.) For the moment we should assume that the preconditions for are not private: that is, Alice will presumably need to reveal something about her identity to the person who issues the credential. For example, she might use her credit card to pay for a subscription (e.g., for a news website), or she might hand over her driver’s license to prove that she’s an adult.