I'm using "tkFileDialog.askopenfilename" to get a file name variable. I know that I can set the "initialdir" option, but not everyone who uses the program will have the target file on the same drive. For example: the file could be located on the C:, D:, E: etc... I don't see a way to view available drives with the dialog box they have open up. I'd like the user to be able to type something like "/h/cowsandstuff" and have it navigate to that directory instead of locking them in. I am programming in a Linux environment, BTW. The analogous function in Windows that I would like is the "My Computer" option in the drop down menu which would list all available drives...
As nosklo sais, in Linux you don't have drive letters. Everything are paths.
If the file can be in any path, I would expect that the user will known the path, but I would consider the next options:

Default to the user's home path. You
can directly use the ´~´and tk will
convert it to the Linux home folder
or the Windows User/My Documents path
Remember the last path so you can use
it in the future.
tkFileDialog.askopenfilename How to specify a different drive?