fix little bug

python/examples/ocr/rec_debugger_server.py

@@ -68,8 +68,12 @@ class OCRService(WebService):
 
 ocr_service = OCRService(name="ocr")
 ocr_service.load_model_config("ocr_rec_model")
-ocr_service.set_gpus("0")
-ocr_service.init_rec()
-ocr_service.prepare_server(workdir="workdir", port=9292, device="gpu", gpuid=0)
+if sys.argv[1] == 'gpu':
+    ocr_service.set_gpus("0")
+    ocr_service.init_rec()
+    ocr_service.prepare_server(workdir="workdir", port=9292, device="gpu", gpuid=0)
+elif sys.argv[1] == 'cpu':
+    ocr_service.init_rec()
+    ocr_service.prepare_server(workdir="workdir", port=9292, device="cpu")
 ocr_service.run_debugger_service()
 ocr_service.run_web_service()