env: python3.9: No such file or directory

Question

I have some python code formatters as git pre-commit hook and I have changed my python version as

brew list | grep python
[email protected]
[email protected]

brew unlink [email protected]
brew unlink [email protected]
brew link [email protected]

python -V
Python 3.7.9

and know seems something get broken and on git commit I get env: python3.9: No such file or directory, so what is env? and how I can edit it to use [email protected]?

Answer 1

In .git/hooks/pre-commit I have

#!/usr/bin/env python3.9

and running pre-commit install fixed it to #!/usr/bin/env python3.7