擅长:python、mysql、java
<pre><code>data = [
{'item': 35964, 'buy': 3717650, ...},
{'item': 35965, 'buy': 3717652, ...},
...
]
by_item = {}
for d in data:
by_item.setdefault(d['item'], []).append(d['buy'])
stats = dict((k, {'minBuy': min(v), 'maxBuy': max(v)})
for k, v in by_item.iteritems())
</code></pre>