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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 build_freeform(self, start_x=0, start_y=0, scale=1.0):
 """Return |FreeformBuilder| object to specify a freeform shape. The optional *start_x* and *start_y* arguments specify the starting pen position in local coordinates. They will be rounded to the nearest integer before use and each default to zero. The optional *scale* argument specifies the size of local coordinates proportional to slide coordinates (EMU). If the vertical scale is different than the horizontal scale (local coordinate units are "rectangular"), a pair of numeric values can be provided as the *scale* argument, e.g. `scale=(1.0, 2.0)`. In this case the first number is interpreted as the horizontal (X) scale and the second as the vertical (Y) scale. A convenient method for calculating scale is to divide a |Length| object by an equivalent count of local coordinate units, e.g. `scale = Inches(1)/1000` for 1000 local units per inch. """

        try:
            x_scale, y_scale = scale
        except TypeError:
            x_scale = y_scale = scale

        return FreeformBuilder.new(self, start_x, start_y, x_scale, y_scale)