python 列表中的字典按某个字段排序

#测试排序
dict3 = {'occurTime':21}
dict1 = {'occurTime':1}
dict2 = {'occurTime':17}

time_list = []
time_list.append(dict1)
time_list.append(dict2)
time_list.append(dict3)
health2 = sorted(time_list, key=lambda k: k['occurTime'])

for it in time_list:
  print(it)