fix: use cpu instead when gpu is invalid

paddleclas.py

@@ -31,6 +31,7 @@ import cv2
 import numpy as np
 from tqdm import tqdm
 from prettytable import PrettyTable
+import paddle
 
 from deploy.python.predict_cls import ClsPredictor
 from deploy.utils.get_image_list import get_image_list
@@ -201,8 +202,13 @@ def init_config(model_type, model_name, inference_model_dir, **kwargs):
 
     if "batch_size" in kwargs and kwargs["batch_size"]:
         cfg.Global.batch_size = kwargs["batch_size"]
+
     if "use_gpu" in kwargs and kwargs["use_gpu"]:
         cfg.Global.use_gpu = kwargs["use_gpu"]
+    if cfg.Global.use_gpu and not paddle.device.is_compiled_with_cuda():
+        msg = "The current running environment does not support the use of GPU. CPU has been used instead."
+        logger.warning(msg)
+        cfg.Global.use_gpu = False
 
     if "infer_imgs" in kwargs and kwargs["infer_imgs"]:
         cfg.Global.infer_imgs = kwargs["infer_imgs"]
@@ -267,17 +273,25 @@ def args_cfg():
         type=str,
         help="The directory of model files. Valid when model_name not specifed."
     )
-    parser.add_argument("--use_gpu", type=str, help="Whether use GPU.")
-    parser.add_argument("--gpu_mem", type=int, default=8000, help="")
+    parser.add_argument("--use_gpu", type=str2bool, help="Whether use GPU.")
+    parser.add_argument(
+        "--gpu_mem",
+        type=int,
+        help="The memory size of GPU allocated to predict.")
     parser.add_argument(
         "--enable_mkldnn",
         type=str2bool,
-        default=False,
         help="Whether use MKLDNN. Valid when use_gpu is False")
-    parser.add_argument("--cpu_num_threads", type=int, default=1, help="")
     parser.add_argument(
-        "--use_tensorrt", type=str2bool, default=False, help="")
-    parser.add_argument("--use_fp16", type=str2bool, default=False, help="")
+        "--cpu_num_threads",
+        type=int,
+        help="The threads number when predicting on CPU.")
+    parser.add_argument(
+        "--use_tensorrt",
+        type=str2bool,
+        help="Whether use TensorRT to accelerate. ")
+    parser.add_argument(
+        "--use_fp16", type=str2bool, help="Whether use FP16 to predict.")
     parser.add_argument("--batch_size", type=int, help="Batch size.")
     parser.add_argument(
         "--topk",