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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 set_margin(self, top=40, bottom=30, left=50, right=10, buffer_size=8):
 """Set margin of the chart. Args: top (int):
 size of top margin in pixels. bottom (int):
 size of bottom margin in pixels. left (int):
 size of left margin in pixels. right (int):
 size of right margin in pixels. buffer_size (int):
 buffer size in pixels between the chart and margins. """

        self.set_integer("top", top)
        self.set_integer("bottom", bottom)
        self.set_integer("left", left)
        self.set_integer("right", right)
        self.set_integer("buffer", buffer_size)