def preprocessor(dom):
    "Removes unwanted parts of DOM."
    options = {
        "processing_instructions": False,
        "remove_unknown_tags": False,
        "safe_attrs_only": False,
        "page_structure": False,
        "annoying_tags": False,
        "frames": False,
        "meta": False,
        "links": False,
        "javascript": False,
        "scripts": True,
        "comments": True,
        "style": True,
        "embedded": True,
        "forms": True,
        "kill_tags": ("head",),
    }
    cleaner = Cleaner(**options)

    return cleaner.clean_html(dom)
Removes unwanted parts of DOM.