擅长:python、mysql、java
<p>另一个类看不到<code>j</code>;但是,我认为您的意思是<code>self.j</code>,它可以。</p>
<pre><code>class A(object):
def __init__(self, x):
self.x = x
class B(object):
def __init__(self):
self.sum = 0
def addA(self, a):
self.sum += a.x
a = A(4)
b = B()
b.addA(a) # b.sum = 4
</code></pre>