#!/usr/bin/python -u
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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.
#
# Prepends input with timestamp. Unlike similar perl version,
# produces microsecond timestamps. Python is unavailable in
# the base Ubuntu image.
#
# Note that "python -u" disables buffering.

import sys
import datetime

while True:
  line = sys.stdin.readline()
  if line == "":
    sys.exit(0)
  sys.stdout.write(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f "))
  sys.stdout.write(line)