Low level file descriptors and high-level Python files

[Grant Edwards]

On 2015-09-01, Laura Creighton <lac at openend.se> wrote:

> Don't go around closing things you don't know are open.  They
> could be some other processes' thing.

I don't understand.  Closing a file descriptor that isn't open is
harmless, isn't it?  Closing one that _is_ open only affects the
current process.  If other processes had the same fd open, it's still
open for them.

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