code: def set_label(self, txt):
      self._axis.set_label_text(txt)
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import matplotlib.axes
  from matplotlib.artist import Artist
  from matplotlib.axis import XAxis, YAxis
label_desc: Use image node_id 6 for calling the SimpleAxisArtist obj's underlying member method code with example usage: obj.set_label(txt) without return types