dataframe: add sample_id generator

Signed-off-by: mgqa34 <mgq3374541@163.com>
Signed-off-by: sagewe <wbwmat@gmail.com>

python/fate/arch/dataframe/utils/_id_generator.py

@@ -0,0 +1,26 @@
+#
+#  Copyright 2019 The FATE 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 time
+import random
+import hashlib
+
+
+def generate_sample_id(n, prefix):
+    return [hashlib.sha256(bytes(prefix + str(i), encoding='utf-8')).hexdigest() for i in range(n)]
+
+
+def generate_sample_id_prefix():
+    return str(time.time()) + str(random.randint(1000000, 9999999))