Alibaba Cloud Object Storage Python SDK 2.x. This version is not compatible with the previous version (Version 0.x). The package name is oss2 to avoid conflict with previous versions. The SDK of this version is dependent on the third-party HTTP library requests and crcmod. Install the SDK following the methods below

Sometimes your SMTP server may return a particular error message. The problem is that it will generally be very cryptic, like "550 Requested action not taken: mailbox unavailable" or "421 Try again later". What does these numbers mean?

First of all: not any reply code is an error. Sometimes it's just a response containing a detail about the server or an answer to a command. Secondly: any code consist of three digits,...