Creates a CTRL file object from an existing file.

        Args:
            filename: The name of the CTRL file. Defaults to 'CTRL'.

        Returns:
            An LMTOCtrl object.

def from_file(cls, filename="CTRL", **kwargs):
        """
        Creates a CTRL file object from an existing file.

        Args:
            filename: The name of the CTRL file. Defaults to 'CTRL'.

        Returns:
            An LMTOCtrl object.
        """
        with zopen(filename, "rt") as f:
            contents = f.read()
        return LMTOCtrl.from_string(contents, **kwargs)