add my_data_generator.py for ut

python/paddle/fluid/tests/unittests/my_data_generator.py

+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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 sys
+import os
+import paddle
+import re
+import collections
+import time
+import paddle.distributed.fleet as fleet
+
+
+class MyDataset(fleet.MultiSlotDataGenerator):
+    def generate_sample(self, line):
+        def data_iter():
+            elements = line.strip().split()[0:]
+            output = [("show", [int(elements[0])]),
+                      ("click", [int(elements[1])]),
+                      ("slot1", [int(elements[2])])]
+            yield output
+
+        return data_iter
+
+
+if __name__ == "__main__":
+    #start = time.clock()
+    d = MyDataset()
+    d.run_from_stdin()
+    #elapsed = (time.clock() - start)
+    #print("Time used:",elapsed)