Pubsub publisher.py throws error "unexpected keyword argument 'data'" #1880

I am trying to execute the file https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/pubsub/cloud-client/publisher.py

I modified the script in my local machine to include Service Account and that is the only change.
publisher = pubsub_v1.PublisherClient.from_service_account_json("<json key>")

This is what I get when i execute:

python publisher.py siva-poc publish "projects/siva-poc/topics/sample_topic"
Traceback (most recent call last):
File "publisher.py", line 275, in
publish_messages(publisher,args.project_id, args.topic_name)
File "publisher.py", line 93, in publish_messages
future = publisher.publish(topic_path, data=data)
TypeError: publish() got an unexpected keyword argument 'data'

I tried a different operation "publish-with-custom-attributes" but it still complains:

python publisher.py siva-poc publish-with-custom-attributes "projects/siva-poc/topics/sample_topic"
Traceback (most recent call last):
File "publisher.py", line 278, in
args.project_id, args.topic_name)
File "publisher.py", line 125, in publish_messages_with_custom_attributes
topic_path, data, origin='python-sample', username='gcp')
TypeError: publish() got an unexpected keyword argument 'origin'

I am not sure why is it complaining about the argument in the publisher_client.

Could someone help me with this, please?