<p>我用Python进行了一个SQLite查询,如下所示:</p>
<pre><code>SharesOwned = db.execute("SELECT SUM(Shares) FROM transactionTable WHERE Share='FB'")
print(SharesOwned)
if sharesOwned < sharesToSell:
return errorMessage("You don't own that many shares of FB")
</code></pre>
<p>它打印:</p>
^{pr2}$
<p>然后它给我这个错误:</p>
<pre><code>TypeError: "List indices must be integers or slices not str"
</code></pre>
<p>如何提取整数形式的数字?在</p>