text: 
  ''' MetaDeep worker '''
  import hashlib
  import ssdeep as ssd
  import pprint
  
  class MetaDeepData(object):
      ''' This worker computes deeper meta-data '''
      dependencies = ['sample', 'meta']
  
      def __init__(self):
          ''' Initialization '''
          self.meta = {}
  
      def execute(self, input_data):
          raw_bytes = input_data['sample']['raw_bytes']
          self.meta['sha1'] = hashlib.sha1(raw_bytes).hexdigest()
          self.meta['sha256'] = hashlib.sha256(raw_bytes).hexdigest()
          self.meta['ssdeep'] = ssd.hash(raw_bytes)
          self.meta['entropy'] = self._entropy(raw_bytes)
          self.meta.update(input_data['meta'])
          return self.meta
  
      def _entropy(self, s):
          # Grabbed this snippet from Rosetta Code (rosettacode.org)
          import math
          from collections import Counter
          p, lns = Counter(s), float(len(s))
          return -sum( count/lns * math.log(count/lns, 2) for count in p.values())
  
  # Unit test: Create the class, the proper input and run the execute() method for a test
  def test():
      ''' meta_deep.py: Unit test'''
  
      # This worker test requires a local server running
      import zerorpc
      workbench = zerorpc.Client(timeout=300, heartbeat=60)
      workbench.connect("tcp://127.0.0.1:4242")
  
      # Generate input for the worker
      import os
      data_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), '../data/log/system.log')
      md5 = workbench.store_sample(open(data_path, 'rb').read(), 'system.log', 'log')
      input_data = workbench.get_sample(md5)
      input_data.update(workbench.work_request('meta', md5))
  
      # Execute the worker (unit test)
      worker = MetaDeepData()
      output = worker.execute(input_data)
      print '\n<<< Unit Test >>>'
      pprint.pprint(output)
  
      # Execute the worker (server test)
      output = workbench.work_request('meta_deep', md5)
      print '\n<<< Server Test >>>'
      pprint.pprint(output)
  
  if __name__ == "__main__":
      test()
  