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我是 python 新手,刚从 php5 迁移过来。我阅读了 qmark 参数符号来准备查询,但我得到以下信息:

Traceback (most recent call last):
  File "t.py", line 10, in <module>
    cursor.execute("SELECT * FROM object WHERE otype = ?", ["user"])
  File "/usr/local/lib/python3.4/site-packages/pymysql/cursors.py", line 130, in execute
    query = query % self._escape_args(args, conn)
TypeError: not all arguments converted during string formatting

这仅适用于 sqlite 连接器吗?

import sys
import pymysql

try:
    connection = pymysql.connect(host="127.0.0.1", user="root", passwd="pass", db="xxx")
except:
    sys.exit("Database connection error")

cursor = connection.cursor()
cursor.execute("SELECT * FROM object WHERE otype = ?", "user")

for row in cursor:
   print(row)

cursor.close()
connection.close()
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1 回答 1

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是的。不幸的是,DB-API 规范让每个实现者来选择参数。pysqlite 选择了 ?,而 MySQLdb 选择了 %s。由于 pymsql 是 MySQLdb 的替代品,因此它也使用 %s。

于 2014-06-17T10:42:48.917 回答