1. f2py doesn’t currently support binding interface blocks. Workarounds:

1.1. Comment all module, contains, ... statements;

1.2. See Using FYPP for binding generic interfaces

2. Your code is F90 with a fixed form. You can use a --f90flags=-ffixed-form, but not all versions of Numpy (f2py) will work stably. It might be worth converting the file to a free form.

Jupyter Notebook with your code: https://github.com/Serge3leo/temp-cola/blob/main/stackoverflow-79661744.ipynb