[issue15805] Add stdout redirection tool to contextlib

Alex Gaynor added the comment: Sounds like a special case of a small part of mock. Not sure that this observation is significant though. -- nosy: +alex ___ Python tracker ___ __

[issue15806] Add context manager for the "try: ... except: pass" pattern

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[issue15805] Add stdout redirection tool to contextlib

Nick Coghlan added the comment: Sure, but by targeting a specific use case you can make it really trivial to use. -- ___ Python tracker ___ _

[issue15806] Add context manager for the "try: ... except: pass" pattern

Raymond Hettinger added the comment: Hmm, the __exit__ method was doing exact matches by exception type, so KeyError wouldn't match LookupError or Exception. There are probably a number of ways to fix this, but it may be easiest to use the builtin exception catching mechanisms: class Ignore:

[issue15806] Add context manager for the "try: ... except: pass" pattern

Alex Gaynor added the comment: Why not just: issubclass(exctype, self.exception_types)? -- ___ Python tracker ___ ___ Python-bugs-list

[issue15806] Add context manager for the "try: ... except: pass" pattern

Raymond Hettinger added the comment: Yes, something along those lines would be *much* better: class Ignore: ''' Context manager to ignore particular exceptions''' def __init__(self, *ignored_exceptions): self.ignored_exceptions = ignored_exceptions def __enter__(self):

[issue15806] Add context manager for the "try: ... except: pass" pattern

Nick Coghlan added the comment: I'd just write it with @contextmanager. Making it easier to cleanly factor out exception handling is one of the main reasons that exists. @contextmanager def ignored(*exceptions): """Context manager to ignore particular exceptions""" try: yiel

[issue15806] Add context manager for the "try: ... except: pass" pattern

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[issue15804] Feature request, implicit "except : pass"

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[issue15798] subprocess.Popen() fails if 0, 1 or 2 descriptor is closed

Ross Lagerwall added the comment: It's caused by the following check in _posixsubprocess.c: if (close_fds && errpipe_write < 3) { /* precondition */ PyErr_SetString(PyExc_ValueError, "errpipe_write must be >= 3"); return NULL; } which was written by Gregory P. Smith in 2

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