Add the polyglot python-task sample

dataflow-website/recipes/polyglot/polyglot-python-task/python_task.py

@@ -0,0 +1,35 @@
+import sys
+import time
+
+from util.task_status import TaskStatus
+from util.task_args import get_task_id, get_db_url, get_task_name, get_cmd_arg
+
+try:
+    print('sys arguments {}'.format(sys.argv))
+
+    status = TaskStatus(get_task_id(), get_db_url())
+
+    # Set task status to RUNNING
+    status.running()
+
+    # Do something
+    print('Start task:{}, id:{}, sqlalchemy-url:{}'.format(get_task_name(), get_task_id(), get_db_url()))
+    print('Wait for 60 seconds ...')
+    sys.stdout.flush()
+    time.sleep(60)
+
+    # if you add --error.message=Bla to the launch properties, an exception is thrown
+    if get_cmd_arg('error.message') is not None:
+        raise Exception(get_cmd_arg('error.message'))
+
+    print("Goodbye!")
+
+    # Mark task completion status change
+    status.completed()
+
+except Exception as exp:
+    error_message = 'Task failed: {}'.format(exp)
+    status.failed(1, error_message, error_message)
+    print(error_message)
+
+