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Is there a way of determining the suffix used after a drive letter to denote a drive, e.g. on Windows the ":" in r"C:\\Dir\\Subdir\\File.Ext" ?  Or is the colon so universal that it is considered unnecessary?  Should it be in the os module somewhere (as far as I can tell, it isn't, although every other kind of file path component separator seems to be) ?
Best wishes
Rob Cliffe