How to run on program without .py extension, and how to see usage message?

My issues are best explained by looking at each of the commands I execute below and their output:

pc:~/my-prog ls -l
total 4
-rwxr-xr-x 1 mark mark 51 Oct 16 12:53 my-prog

pc:~/my-prog cat my-prog 
#!/usr/bin/env python3
print('This is my program')

pc:~/my-prog ../env/bin/vermin my-prog 
Detecting python files..
No files specified to analyze!

pc:~/my-prog ../env/bin/vermin ./my-prog 
Detecting python files..
No files specified to analyze!

pc:~/my-prog ../env/bin/vermin .
Detecting python files..
No files specified to analyze!

pc:~/my-prog ../env/bin/vermin -h
Detecting python files..
No files specified to analyze!

pc:~/my-prog ../env/bin/vermin --help
Detecting python files..
No files specified to analyze!

pc:~/my-prog ../env/bin/vermin --version
Detecting python files..
No files specified to analyze!

pc:~/my-prog ../env/bin/vermin -v
Detecting python files..
No files specified to analyze!

pc:~/my-prog ../env/bin/pip list 
Package    Version
---------- -------
pip        19.3   
setuptools 40.8.0 
vermin     0.8.0  

So the issues I am asking about are:

1. How can I run vermin on a python program without a .py extension?
2. There seems to be no usage message? Nor a way to check the version?
3. Also, I originally installed that env/ virtualenv dir within the source folder (like users normally do for a project) but there seems to be no way to stop vermin recursing through that dir?

[bulletmark]

Thanks for that. Works much better.

Ran it as a test on my program and found a bug immediately!

[netromdk]

It gets shown because searching any number of possible folder structures can take time which is unknown before initiating the search. After the search is complete the concurrent analysis commences.

I guess it might be a verbose level one detail.