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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def transparency(self):
 """ Does the current object contain any transparency. Returns transparency: bool, does the current visual contain transparency """

        if 'vertex_colors' in self._data:
            a_min = self._data['vertex_colors'][:, 3].min()
        elif 'face_colors' in self._data:
            a_min = self._data['face_colors'][:, 3].min()
        else:
            return False

        return bool(a_min < 255)