diff --git a/tools/export_model.py b/tools/export_model.py
index 44de45800d1817b371138310a9ef78cf3077a5fa..d422b6e87401ae1a5cbcb331fbb66dd9a7d49bce 100644
--- a/tools/export_model.py
+++ b/tools/export_model.py
@@ -45,7 +45,7 @@ from ppocr.utils.save_load import init_model
 
 
 def main():
-    startup_prog, eval_program, place, config,_ = program.preProcess()
+    startup_prog, eval_program, place, config, _ = program.preProcess()
 
     feeded_var_names, target_vars, fetches_var_name = program.build_export(
         config, eval_program, startup_prog)