Error following the doc

[shinokada]

Following the README doc, I get the following errors:

wanna think "Recursively finds all .py files under this directory and prints the sum of their line counts"
? What do you want to do ? Recursively finds all .py files under this directory and prints the sum of their line counts

Traceback (most recent call last):
  File "/Users/shinichiokada/.pyenv/versions/3.11.2/bin/wanna", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/Users/shinichiokada/.pyenv/versions/3.11.2/lib/python3.11/site-packages/wanna/cli.py", line 182, in main
    cmd()
  File "/Users/shinichiokada/.pyenv/versions/3.11.2/lib/python3.11/site-packages/click/core.py", line 1130, in __call__
    return self.main(*args, **kwargs)