'Sets the text value of the axis label
ACCEPTS: A string value for the label'

def set_label_text(self, label, fontdict=None, **kwargs):

    self.isDefault_label = False
    self.label.set_text(label)
    if (fontdict is not None):
        self.label.update(fontdict)
    self.label.update(kwargs)
    self.stale = True
    return self.label
