Granularity of OSError

[MRAB]

kj wrote:
> In <mailman.107.1253369463.2807.python-list at python.org> MRAB <python at mrabarnett.plus.com> writes:
> 
>> If, for example, you're
>> going to copy a file, it's a good idea to check beforehand that there's
>> enough space available for the copy.
> 
> How do you do that?
> 
There's os.statvfs(...), although that's Unix only.

The point is that it's sometimes a good idea to do a cheap check first
before attempting an operation that's 'expensive' even when it fails.