fix paddlerec/ctr/dcn use_bn argument (#3933)

PaddleRec/ctr/dcn/cluster_train.py

@@ -10,6 +10,12 @@ from network import DCN
 import utils
 
 
+def boolean_string(s):
+    if s.lower() not in {'false', 'true'}:
+        raise ValueError('Not a valid boolean string')
+    return s.lower() == 'true'
+
+
 def parse_args():
     parser = argparse.ArgumentParser("dcn cluster train.")
     parser.add_argument(
@@ -62,7 +68,7 @@ def parse_args():
         help='Cross net l2 regularizer coefficient')
     parser.add_argument(
         '--use_bn',
-        type=bool,
+        type=boolean_string,
         default=True,
         help='Whether use batch norm in dnn part')
     parser.add_argument(

PaddleRec/ctr/dcn/config.py

@@ -4,6 +4,12 @@ global params
 """
 
 
+def boolean_string(s):
+    if s.lower() not in {'false', 'true'}:
+        raise ValueError('Not a valid boolean string')
+    return s.lower() == 'true'
+
+
 def parse_args():
     parser = argparse.ArgumentParser(description="PaddleFluid DCN demo")
     parser.add_argument(
@@ -61,7 +67,7 @@ def parse_args():
         help='Cross net l2 regularizer coefficient')
     parser.add_argument(
         '--use_bn',
-        type=bool,
+        type=boolean_string,
         default=True,
         help='Whether use batch norm in dnn part')
     parser.add_argument(