New submission from Michael Büsch:
This adds a whitelist parameter with the name 'unless' to contextlib.suppress,
so one can specify exceptions that will not be suppressed.
This is useful for specifying single sub-exceptions that we still want to
catch, even of we want to suppress all other siblings.
Or it can be used to suppress all exceptions except some very specific ones by
suppressing BaseException and whitelisting things like SyntaxError, NameError
and the like.
Usage looks like this:
with suppress(OSError, unless = PermissionError):
with open("foobar", "wb") as f:
f.write(...
I selected the name 'unless' instead of 'whitelist' or such, because I think
that pronounces nicely in the 'with' line context. However please feel free to
make better suggestions.
----------
components: Library (Lib)
files: contextlib-suppress-whitelist.patch
keywords: patch
messages: 273206
nosy: mb_, ncoghlan, yselivanov
priority: normal
severity: normal
status: open
title: contextlib.suppress: Add whitelist argument
type: enhancement
Added file: http://bugs.python.org/file44168/contextlib-suppress-whitelist.patch
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