'Set all the page margins in inches.
Args:
left:   Left margin.
right:  Right margin.
top:    Top margin.
bottom: Bottom margin.
Returns:
Nothing.'

def set_margins(self, left=0.7, right=0.7, top=0.75, bottom=0.75):

    self.margin_left = left
    self.margin_right = right
    self.margin_top = top
    self.margin_bottom = bottom
