<p>我曾在Python中与MySQLDB合作过一段时间,并认为我了解它的工作原理。
但是现在我想定义一个更灵活的方法。阅读代码。。。。你知道吗</p>
<pre class="lang-py prettyprint-override"><code>import MySQLdb as mydb
class DB(object):
def read(self, slct, frm):
connection = mydb.connect("123.12.34.56", "user", "pass", "foo")
cursor = connection.cursor()
cursor.execute("SELECT %s FROM %s", (slct, frm))
print cursor.fetchall()
connection.close()
if __name__ == '__main__':
db = DB()
db.read("*", "bar")
</code></pre>
<p>这给了我一个SQL语法错误。为什么我不能这样用?你知道吗</p>
<blockquote>
<p>ProgrammingError: (1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''bar'' at line 1")</p>
</blockquote>