擅长:python、mysql、java
<pre><code>>>> from ast import literal_eval
>>> a = instr = '{"id":13021,"buys":{"quantity":3494,"unit_price":257},"sells":{"quantity":3187,"unit_price":433}}'
>>> b=literal_eval(a)
>>> b['sells']
{'unit_price': 433, 'quantity': 3187}
>>>
</code></pre>