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我发现了一个问题，我无法用 pygresql for python 来解释。这是一个简单的 SELECT 查询，据我所知，这是整个脚本中唯一有问题的查询。

Exception in thread Thread-3:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/threading.py", line 801, in __bootstrap_inner
    self.run()
  File "/usr/local/lib/python2.7/threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "run_daily_script.py", line 122, in DelegateAPINodes
    vm_api_group = Execute(db_conn, fetch_api_group, (cust_id, nodes["node_id"]))
  File ".../PreparedQueries.py", line 14, in Execute
    result = db.execute(command)
  File "/usr/local/lib/python2.7/site-packages/pgdb.py", line 1030, in execute
    return self.executemany(operation, [parameters])
  File "/usr/local/lib/python2.7/site-packages/pgdb.py", line 1065, in executemany
    raise _op_error("Internal error in '%s': %s" % (sql, err))
OperationalError: Internal error in 'SELECT * FROM vm_api_group WHERE cust_id=3 AND node_id=18': insufficient data in "T" message

我通过控制台运行了查询，它工作得很好。我监视了 psql 日志，并且数据库没有错误。这似乎是 pygresql 的内部操作。

“T”是什么意思，我该如何解决？

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