擅长:python、mysql、java
<p>或一行:</p>
<pre><code>d = {"Laptop" : 3499.0, "Keyboard" : 10.5, "Harddisk" : 159.3, "Mouse" : 8.9}
print('\n'.join(' - $'.join(map(str,i)) for i in zip(sorted(list(d.keys())*len(d),key=list(d.keys()).index),sorted(list(d.values())*len(d),key=list(d.values()).index))))
</code></pre>