diff --git a/mmdnn/conversion/pytorch/pytorch_emitter.py b/mmdnn/conversion/pytorch/pytorch_emitter.py
index ca6d6e0e..6c6a5a18 100644
--- a/mmdnn/conversion/pytorch/pytorch_emitter.py
+++ b/mmdnn/conversion/pytorch/pytorch_emitter.py
@@ -52,8 +52,7 @@ def run(self, dstNetworkPath, dstWeightPath = None, phase = 'test'):
     def add_init(self, indent, codes):
         if isinstance(codes, _string_types):
             codes = [codes]
-        for code in codes:
-            self.init_code += ("    " * indent) + code + '\n'
+        self.init_code += "\n".join([("    " * indent) + code for code in codes]) + "\n"
 
     def parent_variable_name(self, IR_node, path=[0], weight_type='weights'):
         if not IR_node.in_edges and IR_node.name in self.weights_dict.keys():