擅长:python、mysql、java
<p>我还发现了这个函数</p>
<pre><code>class CategoryPipeline(object):
global inf_dict, ctgr
inf_dict = lambda: collections.defaultdict(inf_dict)
ctgr = inf_dict()
def __init__(self):
global file
file = open("test.json","w")
def process_item(self, item, spider):
ctgr[item['bigCtgr']][item['smaCtgr']][item['ssCtgr']][item['sCtgr']] = 'NULL'
def __del__(self):
b = json.dumps(ctgr, ensure_ascii=False).encode('utf-8')
file.write(b)
file.write('\n')
file.close()
</code></pre>