擅长:python、mysql、java
<pre><code>borroweds = [Book('Author Authorsson', 'The book of books', 'ISBN76576575757')]
patron = Patron('thename', 'theid', borroweds)
>>> patron
Patron(thename,theid,[Books(Author Authorsson, The book of books, ISBN76576575757)])
>>> patron.borroweds[0]
Books(Author Authorsson, The book of books, ISBN76576575757)
</code></pre>
<p>另外,跳过类属性,你不需要它们。在</p>
^{pr2}$