"""OpenWhisk "Hello world" in Python.

/*
 * 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.
 */
"""


def main(params):
    if 'name' not in params or 'color' not in params:
        return {'error': 'Please make sure name and color are passed in params.'}
    name = params['name']
    color = params['color']
    message = 'A ' + color + ' cat named ' + name + ' was added.'
    print(message)
    return {'change': message}