xrange replaced with range

'xrange' was used in multiple places. In this setting it provided no measurable gain in terms of performance or memory, but broke python3 compatibility. It was replaced with 'range'

slim/nets/inception_v4.py

@@ -223,7 +223,7 @@ def inception_v4_base(inputs, final_endpoint='Mixed_7d', scope=None):
 
       # 35 x 35 x 384
       # 4 x Inception-A blocks
-      for idx in xrange(4):
+      for idx in range(4):
         block_scope = 'Mixed_5' + chr(ord('b') + idx)
         net = block_inception_a(net, block_scope)
         if add_and_check_final(block_scope, net): return net, end_points
@@ -235,7 +235,7 @@ def inception_v4_base(inputs, final_endpoint='Mixed_7d', scope=None):
 
       # 17 x 17 x 1024
       # 7 x Inception-B blocks
-      for idx in xrange(7):
+      for idx in range(7):
         block_scope = 'Mixed_6' + chr(ord('b') + idx)
         net = block_inception_b(net, block_scope)
         if add_and_check_final(block_scope, net): return net, end_points
@@ -247,7 +247,7 @@ def inception_v4_base(inputs, final_endpoint='Mixed_7d', scope=None):
 
       # 8 x 8 x 1536
       # 3 x Inception-C blocks
-      for idx in xrange(3):
+      for idx in range(3):
         block_scope = 'Mixed_7' + chr(ord('b') + idx)
         net = block_inception_c(net, block_scope)
         if add_and_check_final(block_scope, net): return net, end_points