Problem with os.listdir and delay with unreachable network drives on Windows
ai2009 at yandex.ru
Thu Dec 23 09:44:17 CET 2004
> I wrote my own directory browser in order to get around a bug where
> tkFileDialog.askdirectory() can't handle non-ascii paths. However, I
> have a problem where I call os.listdir() on a mapped network drive,
> e.g. os.listdir("Z:\\"), and if the network drive is unavailable, the
> UI hangs until the OS returns with an exception because the network
> shared drive is unavailable.
> I would like to work around this by simply not looking into mapped
> drives that are not currently mounted. Is there some way to check
> the status of mapped drive to see if it is currently mounted, or a
> better solution? ( I use the call win32api.GetLogicalDriveStrings()
> to get the list of available drives).
> Also, is there any way to enumerate remote volumes that are mounted
> by not mapped? I can't easily find this in the win32 stuff or via
> googling. The win32net calls to enumerate servers and shares sound
> likely, but don't show such volumes on my system, although I may not
> be using the right arguments.
> I have the current Windows binary install of Python 2.3.4 on my
> Windows XP system.
Maybe a win32net.WNetGetUniversalName() [expands drive to UNC name]
and win32net.NetGetUseInfo() [returns various info on UNC name
including status] will help you. I don't have a time to setup shares,
so I can't guarantee that this approach will work as you expect. First
function might raise an exception on disconnected devices, which you
will need to handle. You might also need win32file.GetDriveType() to
distinguish between remote and local drives.
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