fix error in run_ncf.py

Author: zanshuxun

examples/run_ncf.py

@@ -5,14 +5,12 @@
 
 if __name__ == "__main__":
     data = pd.read_csvdata = pd.read_csv("./movielens_sample.txt")
-    sparse_features = ["movie_id", "user_id",
-                       "gender", "age", "occupation", "zip", ]
     SEQ_LEN = 50
     negsample = 3
 
     # 1.Label Encoding for sparse features,and process sequence features with `gen_date_set` and `gen_model_input`
 
-    features = ['user_id', 'movie_id', 'gender', 'age', 'occupation', 'zip']
+    features = ['user_id', 'movie_id', 'gender', 'age', 'occupation', 'zip', "genres"]
     feature_max_idx = {}
     for feature in features:
         lbe = LabelEncoder()