Mark Shannon added the comment:
If all you need is that
with foo:
pass
guarantees that either both or neither of __enter__ and __exit__ are called,
for C context managers, and only C context managers, then the fix is trivial.
To protect Python code would need a custom context manager wrapper
with ProtectsAgainstInterrupt(user_ctx_mngr()):
do_stuff()
ProtectsAgainstInterrupt would need to be implemented in C and install a custom
signal handler.
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nosy: +Mark.Shannon
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<http://bugs.python.org/issue29988>
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