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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 setLabel(self, text=None, units=None, unitPrefix=None, **args):
 """ overwrites pyqtgraph setLabel """

        show_label = False
        if text is not None:
            self.labelText = text
            show_label = True
        if units is not None:
            self.labelUnits = units
            show_label = True
        if show_label:
            self.showLabel()
        if unitPrefix is not None:
            self.labelUnitPrefix = unitPrefix
        if len(args) > 0:
            self.labelStyle = args
        self.label.setHtml(self.labelString())
        self._adjustSize()
        self.picture = None
        self.update()