[Python-Dev] closing files and sockets in a timely manner in the stdlib

[Jack Diederich]

On Fri, Oct 29, 2010 at 8:35 PM, Brett Cannon <brett at python.org> wrote:
> For those of you who have not noticed, Antoine committed a patch that
> raises a ResourceWarning under a pydebug build if a file or socket is
> closed through garbage collection instead of being explicitly closed.

Just yesterday I discovered /proc/<your PID here>/fd/ which is a list
of open file descriptors for your PID on *nix and includes all open
files, pipes, and sockets.  Very handy, I filed some tickets about
company internal libs that were opening file handles as a side effect
of import (logging mostly).  I tried to provoke standard python
imports (non-test) to leave some open handles and came up empty.

-Jack