Alex Shkop added the comment:
@rbcollins that is exactly what was trying to say in previous comment. We can
make a change to current patch that won't affect behavior. In old API in this
sequence of filters last filter was never used:
simplefilter("ignore")
simplefilter("error", append=True)
simplefilter("ignore", append=True) # never used
So I suggest that new patch should work like this:
simplefilter("error")
simplefilter("ignore", append=True) # appends new filter to the end
simplefilter("ignore")
simplefilter("error", append=True)
simplefilter("ignore", append=True) # does nothing since same filter is
present.
This way filtering will work in the same way it worked before patch and we
won't have duplicates.
I'll update the patch as soon as I will get to my computer.
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<http://bugs.python.org/issue18383>
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