Improve Python 3.x compatibility

Some mechanical translation of the deprecated
except x,y construct. Should work with Python >= 2.6
just fine

Change-Id: I394f9956b9e3e3d9f5f1e9ad50c35b13200af2a1

glanceclient/v1/images.py

@@ -207,7 +207,7 @@ class ImageManager(base.Manager):
                 obj_size = obj.tell()
                 obj.seek(0)
                 return obj_size
-            except IOError, e:
+            except IOError as e:
                 if e.errno == errno.ESPIPE:
                     # Illegal seek. This means the user is trying
                     # to pipe image data to the client, e.g.

glanceclient/v1/legacy_shell.py

@@ -50,7 +50,7 @@ def get_image_filters_from_args(args):
     """Build a dictionary of query filters based on the supplied args."""
     try:
         fields = get_image_fields_from_args(args)
-    except RuntimeError, e:
+    except RuntimeError as e:
         print e
         return FAILURE
 
@@ -108,7 +108,7 @@ def do_add(gc, args):
     """DEPRECATED! Use image-create instead."""
     try:
         fields = get_image_fields_from_args(args.fields)
-    except RuntimeError, e:
+    except RuntimeError as e:
         print e
         return FAILURE
 
@@ -182,7 +182,7 @@ def do_update(gc, args):
     """DEPRECATED! Use image-update instead."""
     try:
         fields = get_image_fields_from_args(args.fields)
-    except RuntimeError, e:
+    except RuntimeError as e:
         print e
         return FAILURE
 
@@ -333,7 +333,7 @@ def do_clear(gc, args):
             image.delete()
             if args.verbose:
                 print 'done'
-        except Exception, e:
+        except Exception as e:
             print 'Failed to delete image %s' % image.id
             print e
             return FAILURE

glanceclient/v1/shell.py

@@ -309,7 +309,7 @@ def do_image_delete(gc, args):
             if args.verbose:
                 print '[Done]'
 
-        except exc.HTTPException, e:
+        except exc.HTTPException as e:
             if args.verbose:
                 print '[Fail]'
             print '%s: Unable to delete image %s' % (e, args_image)