比较高效的python 解析XML文件

参考 http://codingpy.com/article/parsing-xml-using-python/

try:    import xml.etree.cElementTree as ETexcept ImportError:    import xml.etree.ElementTree as ETimport timedef parse_poi_by_elementTree(filepath):    t0 = time.time()    tree = ET.ElementTree(file=filepath)    pois_element_num = 0    vde_poi = 0    # for elem in tree.iter(tag='Pois'):    #     pois_element_num = elem.get('Num')    #     print pois_element_num    #     for e in elem.iter():    #         if e.tag == 'Poi':    #             vde_poi += 1    pois_element_num = tree.iter(tag='Pois').next().get('Num')    vde_poi = len(list(tree.iter(tag='Poi')))    cost_time = time.time() - t0    print 'parse_poi_by_elementTree time cost is %s' % cost_time    return pois_element_num, vde_poidef parse_poi_by_iterparse(filepath):    t0 = time.time()    pois_element_num = 0    vde_poi = 0    for event, elem in ET.iterparse(filepath):        # if event == 'end':        if elem.tag == 'Poi':            vde_poi += 1        if elem.tag == "Pois":            pois_element_num = int(elem.get('Num'))        elem.clear()    cost_time = time.time() - t0    print 'parse_poi_by_iterparse time cost is %s' % cost_time    return pois_element_num, vde_poifrom statistic import StatisticItem, XML_STREET, XML_POIimport osdef parse_street_xml_by_ET(street_file):    if not os.path.exists(street_file):        return StatisticItem(XML_STREET, [0, 0])    street_num = 0    vde_streets = 0  # actual count    for event, elem in ET.iterparse(street_file):        if elem.tag == 'Street':            vde_streets += 1        if elem.tag == "Streets":            street_num = int(elem.get('Num'))        elem.clear()    return StatisticItem(XML_STREET, [vde_streets, street_num])def parse_poi_xml_by_ET(poi_file):    if not os.path.exists(poi_file):        return StatisticItem(XML_POI, [0, 0])    poi_num = 0    vde_pois = 0  # actual count    for event, elem in ET.iterparse(poi_file):        if elem.tag == 'Poi':            vde_pois += 1        if elem.tag == "Pois":            poi_num = int(elem.get('Num'))        elem.clear()    return StatisticItem(XML_POI, [vde_pois, poi_num])if __name__ == '__main__':    # C:\Users\shchshan\Desktop\vde\State_14120002\POI_1414000018.xml    # C:\Users\shchshan\Desktop\vde\State_14120001\POI_1414000001.xml    print parse_poi_by_elementTree(r'C:\Users\shchshan\Desktop\vde\State_14120001\POI_1414000001.xml')    print parse_poi_by_iterparse(r'C:\Users\shchshan\Desktop\vde\State_14120001\POI_1414000001.xml')