fix log level for load_and_assign_npz and load_and_assign_npz_dict (#812)

* fix log level for load_and_assign_npz_dict

* update changelog

Author: lgarithm

CHANGELOG.md

@@ -94,7 +94,7 @@ To release a new version, please update the changelog as followed:
 - Setup:
   - Creation of installation flaggs `all_dev`, `all_cpu_dev`, and `all_gpu_dev` (PR #739)
 - Examples:
-  - change folder struction (PR #802) 
+  - change folder struction (PR #802)
   - `tutorial_models_vgg19` has been introduced to show how to use `tl.model.vgg19` (PR #698).
   - fix bug of `tutorial_bipedalwalker_a3c_continuous_action.py` (PR #734, Issue #732)
   - `tutorial_models_vgg16` and `tutorial_models_vgg19` has been changed the input scale from [0,255] to [0,1](PR #710)
@@ -129,6 +129,7 @@ To release a new version, please update the changelog as followed:
 - Dockerfiles import error fixed - issue #733 (PR #747)
 - Fix a typo in `absolute_difference_error` in file: `tensorlayer/cost.py` - Issue #753 (PR #759)
 - Fix the bug of scaling the learning rate of trainer (PR #776)
+- log error instead of info when npz file not found. (PR #812)
 
 ### Security
 

tensorlayer/files/utils.py

@@ -1705,8 +1705,8 @@ def load_and_assign_npz(sess=None, name=None, network=None):
     if sess is None:
         raise ValueError("session is None.")
     if not os.path.exists(name):
-        logging.info("[!] Load {} failed!".format(name))
-        return False
+        logging.error("file {} doesn't exist.".format(name))
+        return
     else:
         params = load_npz(name=name)
         assign_params(sess, params, network)
@@ -1760,8 +1760,8 @@ def load_and_assign_npz_dict(name='model.npz', sess=None):
         raise ValueError("session is None.")
 
     if not os.path.exists(name):
-        logging.info("[!] Load {} failed!".format(name))
-        return False
+        logging.error("file {} doesn't exist.".format(name))
+        return
 
     params = np.load(name)
     if len(params.keys()) != len(set(params.keys())):