model enhancement

alphamind/model/linearmodel.py

@@ -69,6 +69,7 @@ class LinearRegression(ModelBase):
         model_desc['desc'] = encoded.decode('ascii')
         model_desc['sklearn_version'] = sklearn_version
         model_desc['trained_time'] = self.trained_time
+        model_desc['coef'] = list(self.impl.coef_)
         return model_desc
 
     def score(self) -> float:

alphamind/model/modelbase.py

@@ -6,6 +6,7 @@ Created on 2017-9-4
 """
 
 import abc
+import arrow
 import numpy as np
 from alphamind.utilities import alpha_logger
 
@@ -32,6 +33,7 @@ class ModelBase(metaclass=abc.ABCMeta):
 
         model_desc = dict(model_name=self.__class__.__module__ + "." + self.__class__.__name__,
                           language='python',
+                          saved_time=arrow.now().format("YYYY-MM-DD HH:mm:ss"),
                           features=list(self.features))
         return model_desc