change python to visualdl

visualdl/__init__.py

+import log
+import tensorboard
+import timer
+import util
+
+__all__ = [
+    'log',
+    'util'
+]

visualdl/log.py

+import logging
+
+logger = logging
+
+logger.basicConfig(
+    format='[%(levelname)s %(asctime)s %(filename)s:%(lineno)s] %(message)s')
+logger.getLogger().setLevel(logging.INFO)