feat: delete feature with one value (#190)

* delete_feature_with_one_value

easy_rec/python/tools/add_feature_info_to_config.py

@@ -31,17 +31,19 @@ def main(argv):
       FLAGS.template_config_path)
 
   reader = common_io.table.TableReader(
-      FLAGS.config_table, selected_cols='feature,feature_info')
+      FLAGS.config_table, selected_cols='feature,feature_info,message')
   feature_info_map = {}
+  drop_feature_names = []
   while True:
     try:
       record = reader.read()
       feature_name = record[0][0]
       feature_info_map[feature_name] = json.loads(record[0][1])
+      if 'DROP IT' in record[0][2]:
+          drop_feature_names.append(feature_name)
     except common_io.exception.OutOfRangeException:
       reader.close()
       break
-
   for feature_config in config_util.get_compatible_feature_configs(
       pipeline_config):
     feature_name = feature_config.input_names[0]
@@ -77,6 +79,17 @@ def main(argv):
           'decay_steps']
     logging.info('modify decay_steps to %s' % learning_rate.decay_steps)
 
+  for feature_group in pipeline_config.model_config.feature_groups:
+    feature_names = feature_group.feature_names
+    reserved_features = []
+    for feature_name in feature_names:
+      if feature_name not in drop_feature_names:
+        reserved_features.append(feature_name)
+      else:
+        logging.info('drop feature: %s' % feature_name)
+    feature_group.ClearField('feature_names')
+    feature_group.feature_names.extend(reserved_features)
+
   config_dir, config_name = os.path.split(FLAGS.output_config_path)
   config_util.save_pipeline_config(pipeline_config, config_dir, config_name)