TypeError：在元组python的字符串格式错误期间，并非所有参数都被转换

Question

我想在数据库中保存一堆元组

 cursor = cnx.cursor()
         query = """INSERT INTO `TableA`
                     (`clientid`,
                    `createddatetime`,
                    `siteid`,...)
                 VALUES(?,?,?,...)"""

    cursor.executemany(query, listTosave)

MylistTosave包含元组列表，如

[('AS0001', '1170', 1, '1', 'Unknown', 442, 1, datetime.datetime(2018, 5, 28, 23, 0), datetime.datetime(2018, 3, 15, 11, 15), datetime.datetime(2018, 3, 15, 10, 56), datetime.datetime(2018, 5, 28, 23, 18, 26), datetime.datetime(2018, 5, 28, 23, 59, 22), Decimal('15177.3184'), Decimal('15185.7562'), Decimal('8.4378'), Decimal('1313.0547'), Decimal('1313.6179'), Decimal('0.5632'), Decimal('0.0000'), Decimal('0.0000'), Decimal('0.0000'), Decimal('0.0000'), Decimal('0.0000'), Decimal('0.0000'), Decimal('24.6518'), Decimal('24.6518'), 15101.7062, 0.0, 0.0, 0.0, 24.6563), (........... )]

当我试图拯救时，我得到了

 File "/tmp/pymodules/pymysql/cursors.py", line 194, in executemany
  File "/tmp/pymodules/pymysql/cursors.py", line 194, in <genexpr>
  File "/tmp/pymodules/pymysql/cursors.py", line 163, in execute
  File "/tmp/pymodules/pymysql/cursors.py", line 142, in mogrify
TypeError: not all arguments converted during string formatting

为什么会出现这个错误？你知道吗

编辑：我还将datetime对象/十进制对象转换为字符串。我的新单子是这样的

[('AS0001', '1170', '1', '1', 'Unknown', '442', '1', '2018-05-28 23:00:00', '2018-03-15 11:15:00', '2018-03-15 10:56:00', '2018-05-28 23:18:26', '2018-05-28 23:59:22', '15177.3184', '15185.7562', '8.4378', '1313.0547', '1313.6179', '0.5632', '0.0000', '0.0000', '0.0000', '0.0000', '0.0000', '0.0000', '24.6518', '24.6518', '15101.7062', '0.0', '0.0', '0.0', '24.6563'), (.....)]

但我还是犯了同样的错误

Answer 1

根据返回的错误推测，这可能与存储在列表中的datetime对象有关，没有正确地转换为字符串表示形式。用str()包装这些可能是问题的原因。你知道吗

请注意以下示例：

>>> import datetime
>>> datetime.datetime.now()
datetime.datetime(2018, 5, 31, 8, 42, 48, 172575)
>>> str(datetime.datetime.now())
'2018-05-31 08:42:53.192586'

另一个选项可以通过将列表元素使用json.dumps字符串格式来消除错误。但这取决于您希望如何在数据库中存储数据。请参见以下内容：

>>> import json
>>> element = (
... 'AS0001', '1170', '1', '1', 'Unknown', '442', '1', '2018-05-28 23:00:00', '2018-03-15 11:15:00', '2018-03-15 10:56:00',
... '2018-05-28 23:18:26', '2018-05-28 23:59:22', '15177.3184', '15185.7562', '8.4378', '1313.0547', '1313.6179', '0.5632',
... '0.0000', '0.0000', '0.0000', '0.0000', '0.0000', '0.0000', '24.6518', '24.6518', '15101.7062', '0.0', '0.0', '0.0',
... '24.6563')
>>> json.dumps(element)
'["AS0001", "1170", "1", "1", "Unknown", "442", "1", "2018-05-28 23:00:00", "2018-03-15 11:15:00", "2018-03-15 10:56:00", "2018-05-28 23:18:26", "2018-05-28 23:59:22", "15177.3184", "15185.7562", "8.4378", "1313.0547", "1313.6179", "0.5632", "0.0000", "0.0000", "0.0000", "0.0000", "0.0000", "0.0000", "24.6518", "24.6518", "15101.7062", "0.0", "0.0", "0.0", "24.6563"]'

检索此数据时，可以使用json.loads将其加载回python对象格式

Answer 2

这是一个最小的例子，我得到了工作。你知道吗

query = "INSERT INTO `pet`(`name`,`owner`) values(%s,%s)"
listTosave = [('some','shsjhs'),('sosos','shshsh')]
cursor.executemany(query, listTosave)

确保您有一个元组列表，并且在查询字符串中使用%s