Class DistutilsFileError

              object --+            
                       |            
exceptions.BaseException --+        
                           |        
        exceptions.Exception --+    
                               |    
                  DistutilsError --+
                                   |
                                  DistutilsFileError

Any problems in the filesystem: expected file not found, etc. Typically this is for problems that we detect before IOError or OSError could be raised.