r"""
    Given a Python string ``original``, remove unsupported characters, map characters
    to integers and return a numpy array representing the processed string.

def text_to_char_array(original, alphabet):
    r"""
    Given a Python string ``original``, remove unsupported characters, map characters
    to integers and return a numpy array representing the processed string.
    """
    return np.asarray([alphabet.label_from_string(c) for c in original])