add_clinvar_data.py 文件源码

def _get_elements(self, fp, tag):
        '''
            Convenience and memory management function
            that iterates required tags
        '''
        context = iter(ET.iterparse(fp, events=('start', 'end')))
        _, root = next(context)  # get root element
        for event, elem in context:
            if event == 'end' and elem.tag == tag:
                yield elem
                root.clear()  # preserve memory