AttributeError: module 'ros2_graph' has no attribute '__main__'.

[tiko5000]

I followed the tutorial and when I run ros2 run turtlesim turtlesim_node and then in another terminal ros2_graph /turtlesim -o turtle_diagram.md I get the following error:

Traceback (most recent call last):
  File "/home/xxx/install/ros2_graph/bin/ros2_graph", line 33, in <module>
    sys.exit(load_entry_point('ros2-graph==0.0.3', 'console_scripts', 'ros2_graph')())
  File "/home/xxx/install/ros2_graph/bin/ros2_graph", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 173, in load
    return functools.reduce(getattr, attrs, module)
AttributeError: module 'ros2_graph' has no attribute '__main__'. Did you mean: '__name__'?