sounds very much like https://www.python.org/dev/peps/pep-0463/#rejection-notice
I'm concerned with the `safe` defaulting to a bare `except:` which will also
catch CancelledError other errors that should be re-raised
also
```
file = safe open('some_file')
```
does not provide a way to manage the file with a context manager:
```
f = safe open("some_file")
if f is None:
# do something
else:
with f:
# do something else
```
seems no improvement than the current:
```
try:
f = open("some_file")
except OSError:
# do something
else:
with f:
# do something else
```
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