小编fut*_*bel的帖子

我是Boto的新手,我正在尝试使用它将Python字典插入Amazon DynamoDB.我必须遗漏一些东西,因为"dynamizer"(编码器)似乎不支持None值.这是一个问题,因为源数据中有大量的空值.我可以遍历每一行并删除所有值为None的键/值项,但不知何故,我觉得像Boto那样复杂的包应该为我处理.我只是想插入一行,如下所示:

conn = DynamoDBConnection(region=RegionInfo(endpoint="dynamodb.us-west-2.amazonaws.com"))
dest = Table('d_company', connection=conn)
data = {"company_id":99999, "company_name":None}
dest.put_item(data)

......这给了我错误:

Error
Traceback (most recent call last):
  File "TestDynamoDB.py", line 37, in testPutIntoDynamoDB
    dest.put_item(data)
  File "C:\Python27\lib\site-packages\boto\dynamodb2\table.py", line 452, in put_item
    return item.save(overwrite=overwrite)
  File "C:\Python27\lib\site-packages\boto\dynamodb2\items.py", line 362, in save
    final_data = self.prepare_full()
  File "C:\Python27\lib\site-packages\boto\dynamodb2\items.py", line 265, in prepare_full
    final_data[key] = self._dynamizer.encode(value)
  File "C:\Python27\lib\site-packages\boto\dynamodb\types.py", line 228, in encode
    dynamodb_type = self._get_dynamodb_type(attr)
  File "C:\Python27\lib\site-packages\boto\dynamodb\types.py", line 220, in _get_dynamodb_type
    return get_dynamodb_type(attr)
  File "C:\Python27\lib\site-packages\boto\dynamodb\types.py", line 110, in get_dynamodb_type
    raise TypeError(msg)
TypeError: …