old_contents: # -*- coding: utf-8 -*-
  
  
  from __future__ import absolute_import
  from dp_tornado.engine.helper import Helper as dpHelper
  
  import json
  
  
  class JsonHelper(dpHelper):
      def serialize(self, a, raise_exception=False, separators=(',', ':')):
          try:
              return self.dumps(a, separators=separators)
          except Exception as e:
              if raise_exception:
                  raise e
  
              return False
  
      def deserialize(self, a, raise_exception=False):
          try:
              return self.loads(a)
          except Exception as e:
              if raise_exception:
                  raise e
  
              return False
  
      def dumps(self, a, separators=None):
          return json.dumps(a, separators=separators)
  
      def loads(self, a, encoding='utf8'):
          return json.loads(a, encoding=encoding)
  
new_contents: # -*- coding: utf-8 -*-
  
  
  from __future__ import absolute_import
  from dp_tornado.engine.helper import Helper as dpHelper
  
  import json
  
  
  class JsonHelper(dpHelper):
      def serialize(self, a, raise_exception=False, separators=(',', ':')):
          try:
              return self.dumps(a, separators=separators)
          except Exception as e:
              if raise_exception:
                  raise e
  
              return False
  
      def deserialize(self, a, raise_exception=False):
          try:
              return self.loads(a)
          except Exception as e:
              if raise_exception:
                  raise e
  
              return False
  
      def dumps(self, a, separators=None, indent=None):
          return json.dumps(a, separators=separators, indent=indent)
  
      def loads(self, a, encoding='utf8'):
          return json.loads(a, encoding=encoding)
  
subject: add indent parameter for json dumps.