Revert "replace the arg engine with config"

This reverts commit f525cea0.

ppcls/data/__init__.py

@@ -220,21 +220,23 @@ class DataIterator(object):
         return batch
 
 
-def build_dataloader(config, mode):
-    if "class_num" in config["Global"]:
-        global_class_num = config["Global"]["class_num"]
+def build_dataloader(engine):
+    if "class_num" in engine.config["Global"]:
+        global_class_num = engine.config["Global"]["class_num"]
         if "class_num" not in config["Arch"]:
-            config["Arch"]["class_num"] = global_class_num
+            engine.config["Arch"]["class_num"] = global_class_num
             msg = f"The Global.class_num will be deprecated. Please use Arch.class_num instead. Arch.class_num has been set to {global_class_num}."
         else:
             msg = "The Global.class_num will be deprecated. Please use Arch.class_num instead. The Global.class_num has been ignored."
         logger.warning(msg)
 
-    class_num = config["Arch"].get("class_num", None)
-    config["DataLoader"].update({"class_num": class_num})
-    config["DataLoader"].update({"epochs": config["Global"]["epochs"]})
+    class_num = engine.config["Arch"].get("class_num", None)
+    engine.config["DataLoader"].update({"class_num": class_num})
+    engine.config["DataLoader"].update({
+        "epochs": engine.config["Global"]["epochs"]
+    })
 
-    use_dali = config["Global"].get("use_dali", False)
+    use_dali = engine.use_dali
     dataloader_dict = {
         "Train": None,
         "UnLabelTrain": None,
@@ -243,37 +245,37 @@ def build_dataloader(config, mode):
         "Gallery": None,
         "GalleryQuery": None
     }
-    if mode == 'train':
+    if engine.mode == 'train':
         train_dataloader = build(
-            config["DataLoader"], "Train", use_dali, seed=None)
+            engine.config["DataLoader"], "Train", use_dali, seed=None)
 
-        if config["DataLoader"]["Train"].get("max_iter", None):
+        if engine.config["DataLoader"]["Train"].get("max_iter", None):
             # set max iteration per epoch mannualy, when training by iteration(s), such as XBM, FixMatch.
-            max_iter = config["Train"].get("max_iter")
-        update_freq = config["Global"].get("update_freq", 1)
-        max_iter = train_dataloader.max_iter // update_freq * update_freq
+            max_iter = engine.config["Train"].get("max_iter")
+        max_iter = train_dataloader.max_iter // engine.update_freq * engine.update_freq
         train_dataloader.max_iter = max_iter
-        if config["DataLoader"]["Train"].get("convert_iterator", True):
+        if engine.config["DataLoader"]["Train"].get("convert_iterator", True):
             train_dataloader = DataIterator(train_dataloader, use_dali)
         dataloader_dict["Train"] = train_dataloader
 
-    if config["DataLoader"].get('UnLabelTrain', None) is not None:
+    if engine.config["DataLoader"].get('UnLabelTrain', None) is not None:
         dataloader_dict["UnLabelTrain"] = build(
-            config["DataLoader"], "UnLabelTrain", use_dali, seed=None)
+            engine.config["DataLoader"], "UnLabelTrain", use_dali, seed=None)
 
-    if mode == "eval" or (mode == "train" and
-                          config["Global"]["eval_during_train"]):
-        if config["Global"]["eval_mode"] in ["classification", "adaface"]:
+    if engine.mode == "eval" or (engine.mode == "train" and
+                                 engine.config["Global"]["eval_during_train"]):
+        if engine.config["Global"][
+                "eval_mode"] in ["classification", "adaface"]:
             dataloader_dict["Eval"] = build(
-                config["DataLoader"], "Eval", use_dali, seed=None)
-        elif config["Global"]["eval_mode"] == "retrieval":
-            if len(config["DataLoader"]["Eval"].keys()) == 1:
-                key = list(config["DataLoader"]["Eval"].keys())[0]
+                engine.config["DataLoader"], "Eval", use_dali, seed=None)
+        elif engine.config["Global"]["eval_mode"] == "retrieval":
+            if len(engine.config["DataLoader"]["Eval"].keys()) == 1:
+                key = list(engine.config["DataLoader"]["Eval"].keys())[0]
                 dataloader_dict["GalleryQuery"] = build(
-                    config["DataLoader"]["Eval"], key, use_dali)
+                    engine.config["DataLoader"]["Eval"], key, use_dali)
             else:
                 dataloader_dict["Gallery"] = build(
-                    config["DataLoader"]["Eval"], "Gallery", use_dali)
-                dataloader_dict["Query"] = build(config["DataLoader"]["Eval"],
-                                                 "Query", use_dali)
+                    engine.config["DataLoader"]["Eval"], "Gallery", use_dali)
+                dataloader_dict["Query"] = build(
+                    engine.config["DataLoader"]["Eval"], "Query", use_dali)
     return dataloader_dict

ppcls/engine/engine.py

@@ -76,7 +76,7 @@ class Engine(object):
 
         # build dataloader
         self.use_dali = self.config["Global"].get("use_dali", False)
-        self.dataloader_dict = build_dataloader(self.config, mode)
+        self.dataloader_dict = build_dataloader(self)
 
         # build loss
         self.train_loss_func, self.unlabel_train_loss_func, self.eval_loss_func = build_loss(