擅长:python、mysql、java
<p><code>':memory:'</code>字符串完全依赖于数据库。如<a href="http://docs.python.org/library/sqlite3.html#sqlite3.connect">documentation for ^{<cd2>}</a>中所述:</p>
<blockquote>
<p>You can use <code>":memory:"</code> to open a database connection to a database that resides in RAM instead of on disk.</p>
</blockquote>
<p>就Python语言而言,<code>':memory:'</code>和其他语言一样只是一个字符串。你知道吗</p>