<p>我收到此代码的无效语法错误:</p>
<pre><code>def __str__(self):
s= 'Patron("'+self.name+'","'+self.patron_id+'","['+ \
for book in self.borroweds:
s+=str(book) + ', '
if len(self.borroweds) != 0:
s= s[:-2]
s+='])'
return s
for book in self.borroweds:
^
SyntaxError: invalid syntax
>>>
</code></pre>
<p>我知道这是因为我有一个“\”,但我把它放了,这样我就可以继续写我的代码了</p>