Function decorate

src/10/monkeypatching_modules_on_import/postimport.py:32–37

(func)

def when_imported(fullname):
    def decorate(func):
        if fullname in sys.modules:
            func(sys.modules[fullname])
        else:
            _post_import_hooks[fullname].append(func)
        return func
    return decorate
    
sys.meta_path.insert(0, PostImportFinder())