add the logger

.gitignore

-!ppcls/ 
 *.pyc
 *.sw*
-*log*
-/dataset
+*/workerlog*
+dataset/
 checkpoints/
 output/
 pretrained/

ppcls/utils/logger.py

+#copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+#Licensed under the Apache License, Version 2.0 (the "License");
+#you may not use this file except in compliance with the License.
+#You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#Unless required by applicable law or agreed to in writing, software
+#distributed under the License is distributed on an "AS IS" BASIS,
+#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#See the License for the specific language governing permissions and
+#limitations under the License.
+
+import os
+import logging
+import random
+
+DEBUG = logging.DEBUG  #10
+INFO = logging.INFO  #20
+WARN = logging.WARN  #30
+ERROR = logging.ERROR  #40
+
+
+class Logger(object):
+    """
+    Logger
+    """
+
+    def __init__(self, level=DEBUG):
+        self.init(level)
+
+    def init(self, level=DEBUG):
+        """
+        init
+        """
+        self._logger = logging.getLogger()
+        self._logger.setLevel(level)
+
+    def info(self, fmt, *args):
+        """info"""
+        self._logger.info(fmt, *args)
+
+    def warning(self, fmt, *args):
+        """warning"""
+        self._logger.warning(fmt, *args)
+
+    def error(self, fmt, *args):
+        """error"""
+        self._logger.error(fmt, *args)
+
+
+_logger = Logger()
+
+
+def init(level=DEBUG):
+    """init for external"""
+    _logger.init(level)
+
+
+def info(fmt, *args):
+    """info"""
+    _logger.info(fmt, *args)
+
+
+def warning(fmt, *args):
+    """warn"""
+    _logger.warning(fmt, *args)
+
+
+def error(fmt, *args):
+    """error"""
+    _logger.error(fmt, *args)