Clarification Needed: Neo4j Connection for Neo4jGraph in Colab

[SandhiyaGiri]

I'm encountering a ValueError when trying to run the following code block in Google Colab:

kg = Neo4jGraph( url=NEO4J_URI, username=NEO4J_USERNAME, password=NEO4J_PASSWORD, database=NEO4J_DATABASE )

ERROR :
ValueError: Did not find url, please add an environment variable NEO4J_URI which contains it, or pass url as a named parameter.

Should I establish a connection to a Neo4j DBMS before running this code block? OR
Is there a simpler way to run this code in Colab, without explicitly connecting beforehand?

[dzlab]

the NEO4J_URI should be pointing to an neo4j instance, the same for the other variables they should correspond to your neo4j instance. In the lab, they had set up an instance, if you're trying to run the code outside the lab environment the you do need to setup a neo4j to be able to run the code in the notebooks.