Just pointed out the code was better written with

        try: # ...
        except ImportError, why:
        except: # ...
All other changes are re-indenting/formatting.

setup.py

@@ -207,16 +207,14 @@ class PyBuildExt(build_ext):
             self.get_ext_filename(self.get_ext_fullname(ext.name)))
         try:
             imp.load_dynamic(ext.name, ext_filename)
-        except:
-
-            exc_type, why, tb = sys.exc_info()
-            if issubclass(exc_type, ImportError):
+        except ImportError, why:
             self.announce('*** WARNING: renaming "%s" since importing it'
                           ' failed: %s' % (ext.name, why), level=3)
             assert not self.inplace
             basename, tail = os.path.splitext(ext_filename)
             newname = basename + "_failed" + tail
-                if os.path.exists(newname): os.remove(newname)
+            if os.path.exists(newname):
+                os.remove(newname)
             os.rename(ext_filename, newname)
 
             # XXX -- This relies on a Vile HACK in
@@ -230,7 +228,8 @@ class PyBuildExt(build_ext):
                     os.remove(filename)
             except AttributeError:
                 self.announce('unable to remove files (ignored)')
-            else:
+        except:
+            exc_type, why, tb = sys.exc_info()
             self.announce('*** WARNING: importing extension "%s" '
                           'failed with %s: %s' % (ext.name, exc_type, why),
                           level=3)