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Is there a simply way to create a macro like thing with classes so I can actually import and use other python modules?

I have this current macro that I need to make smarter:

```def docker_cache_from(repository: str, image_tags: list[str]):
    cache_from = []
    for image_tag in image_tags:
        cache_from.append(
            {
                "type": "registry",
                "ref": f"our-register-url/{repository}:{image_tag}",
            }
        )

    return cache_from```
The macro is used as an argument to docker_image cache_from param.

I decided just to workaround this with:

```my_module = __import__('module_name')```

It would be nice if there was an easy way to add a macro that could use imports.

For history, other ways to bypass

```os_module = getattr(__builtins__, '__import__')('os')```
```imp = "".join(['i', 'm', 'p', 'o', 'r', 't'])
exec(f"{imp} os")```
```os_module = eval('__import__("os")')```

What are you importing? This is potentially a recipe for explosions and confusion

(`os` in particular seems like an risky one!)