add_nodes_from

I recently started working with NetworkX in Python, and I’m trying to add new nodes to a graph using the `add_nodes_from()` method. However, upon trying to run my code, I receive the error message “module ‘networkx’ has no attribute ‘add_nodes_from'”. I have double-checked my code to ensure that I am calling the method correctly, but I am still receiving the same error message. Here’s an example of my code:

import networkx as nx
G = nx.Graph()
G.add_nodes_from([1, 2, 3])

I’m not sure what could be causing this error, as it seems like my code should be working. Do you have any suggestions for things I could try to fix this issue?
Additionally, I noticed that the version of NetworkX that I installed is different from the version that is currently listed on their website. Could this be causing compatibility issues with the `add_nodes_from()` method? If so, is there a way for me to downgrade my version of NetworkX to match the version listed on the website, or do I need to make changes to my code to accommodate the version that I have installed?