Add Python code sample for Cloud Functions + Memorystore for Re… (#2181)

* Add Python code sample for Cloud Functions + Memorystore for Redis

functions/memorystore/redis/main.py

@@ -0,0 +1,29 @@
+# Copyright 2019 Google LLC
+#
+# 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.
+
+# [START functions_memorystore_redis]
+
+import os
+import redis
+
+redis_host = os.environ.get('REDISHOST', 'localhost')
+redis_port = int(os.environ.get('REDISPORT', 6379))
+redis_client = redis.StrictRedis(host=redis_host, port=redis_port)
+
+
+def visit_count(request):
+    value = redis_client.incr('visits', 1)
+    return 'Visit count: {}'.format(value)
+
+# [END functions_memorystore_redis]

functions/memorystore/redis/requirements.txt

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+redis==3.0.1