def METHOD_NAME(self, indices):
    """Highlight the entire expression"""
    if self.text.get(indices[1]) in (')', ']', '}'):
        rightindex = indices[1]+"+1c"
    else:
        rightindex = indices[1]
    self.text.tag_add("paren", indices[0], rightindex)
    self.text.tag_config("paren", self.HILITE_CONFIG)