擅长:python、mysql、java
<p>为什么不只用一门课呢?在</p>
<pre><code>class Car(object):
def __init__(self, color, max_speed = 50):
self.color = color
self.max_speed = max_speed
def drive(self):
print "Driving at %s mph"%self.max_speed
c=Car('blue')
c.max_speed = 100
</code></pre>