python 列表中的n个字典的更新问题

弄了一下午还是没想明白：
eg:
d1 = [{"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}] * 10
d2 = [{"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}, {"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}, {"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}, {"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}, {"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}, {"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}, {"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}, {"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}, {"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}, {"eslid":"5A-15-D4-99","nw1":"51-02-01-66","nw3":"50",'rfpower': '50', 'netid': '65', 'apid': 1, 'version': '51', 'battery': '30', 'reverse': '0'}]

    #分别对d1和d2进行操作
     for i in range(10):
                    d1[i]['eslid'] = L[i][0]
                    d1[i]['nw1'] = L[i][1]
                    d1[i]['nw3'] = L[i][2]

    #然后分别打印d1与d2
    发现d1是最后更新的值
    d2的值是正常更新的
    为什么呢？

http://blog.csdn.net/bolike/article/details/20402077