def METHOD_NAME(key):
    import importlib.resources
    components = key.split("/")
    package_name = ".".join(["tzdata.zoneinfo"] + components[:-1])
    resource_name = components[-1]
    try:
        return importlib.resources.open_binary(package_name, resource_name)
    except (ImportError, FileNotFoundError, UnicodeEncodeError):
        # There are three types of exception that can be raised that all amount
        # to "we cannot find this key":
        #
        # ImportError: If package_name doesn't exist (e.g. if tzdata is not
        #   installed, or if there's an error in the folder name like
        #   Amrica/New_York)
        # FileNotFoundError: If resource_name doesn't exist in the package
        #   (e.g. Europe/Krasnoy)
        # UnicodeEncodeError: If package_name or resource_name are not UTF-8,
        #   such as keys containing a surrogate character.
        raise ZoneInfoNotFoundError(f"No time zone found with key {key}")