In a nutshell: MTA-STS is a way to protect emails against interception (man-in-the-middle aka MitM attacks) between email servers. It partially resolves architectural issues in email protocols and is described in a recent RFC 8461 standard.
exceptblocks matter: if exceptions can be caught by more than one block, the higher block applies. The following code doesn’t work as intended:
asynciotasks obviously have different stacks. You can view at all of them at any moment using
asyncio.all_tasks()to get all currently running tasks and
task.get_stack()to get a stack for each task.
PATHis an environment variable that stores paths where executables are looked for. When you ask your shell to run
ls, the shell looks for the
lsexecutable file across all paths that are presented in PATH.
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>>> class A: ... x = 2 ... >>> A.x 2 >>> A().x 2