Update __init__.py

src/gausskernel/dbmind/tools/app/diagnosis/query/slow_sql/featurelib/__init__.py

@@ -14,11 +14,23 @@ import os
 
 from . import feature_mapping
 from . import features
+# To import file feature_mapping and features from parent folder
 
+#function name: load_feature_lib
+#description: Print the variable FEATURE_LIB in the file-- features
+#return value: The value of FEATURE_LIB
+#date: 2022/8/2
+#contact: 1865997821
 
 def load_feature_lib():
     return features.FEATURE_LIB
 
+#function name: get_feature_mapper
+#description: Get the item and value of a dictionary type in the file-- feature_mapping and output it as a generator.
+#return value: The item and value in _dict_  variable
+#note：Dictionary key-value pairs must start with C then the  item and value will be return.
+#date: 2022/8/2
+#contact: 1865997821
 
 def get_feature_mapper():
     return {