python解析json串与正则匹配对比方法

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#!/usr/bin/env python#coding:utf-8import jsonimport sysimport collectionsimport timedef t1(): start = time.clock() for line in sys.stdin:  try:   line = line.strip()   decoded = json.loads(line)   device_id = decoded["device_id"]   print device_id  except Exception,ex:   pass end = time.clock() print "The cost time is: %f" %(end - start)t1()

#!/usr/bin/env pythonimport reimport sysimport timedef t1(): start = time.clock() count = 0 for line in sys.stdin:  line = line.strip()  pattern = re.compile("(?:/"device_id/":/")([^/"]+)")  search = pattern.search(line)  if search:   count += 1   #print search.groups()[0] end = time.clock() print "The count is: %d" %(count) print "The cost time is: %f" %(end - start)t1()

re.compile("(?:/"device_id/":/")([^/"]+)")