@property
    def left_margin(self):
        pgMar = self.pgMar
        if pgMar is None:
            return None
        return pgMar.left
The value of the ``w:left`` attribute in the ``<w:pgMar>`` child
dataset/ETHPy150Open python-openxml/python-docx/docx/oxml/section.py/CT_SectPr.left_margin