text: import json
  from chargebee.model import Model
  from chargebee import request
  from chargebee import APIError
  
  class Export(Model):
      class Download(Model):
        fields = ["download_url", "valid_till"]
        pass
  
      fields = ["id", "operation_type", "mime_type", "status", "created_at", "download"]
      def wait_for_export_completion(self):
          return wait_for_export_completion()
  
      def wait_for_export_completion(self, env=None, headers=None):
          import time
          count = 0
          sleep_time_millis = (10000 if env == None else env.export_sleep_millis)/1000.0
  
          while self.status == 'in_process':
              if count > 50:
                  raise RuntimeError('Export is taking too long')
              count+=1
              time.sleep(sleep_time_millis);
              self.values = Export.retrieve(self.id, env, headers).export.values
              self.load(self.values)
          return self
  
  
      @staticmethod
      def retrieve(id, env=None, headers=None):
          return request.send('get', request.uri_path("exports",id), None, env, headers)
  
      @staticmethod
      def revenue_recognition(params, env=None, headers=None):
          return request.send('post', request.uri_path("exports","revenue_recognition"), params, env, headers)
  
      @staticmethod
      def deferred_revenue(params, env=None, headers=None):
          return request.send('post', request.uri_path("exports","deferred_revenue"), params, env, headers)
  
      @staticmethod
      def plans(params=None, env=None, headers=None):
          return request.send('post', request.uri_path("exports","plans"), params, env, headers)
  
      @staticmethod
      def addons(params=None, env=None, headers=None):
          return request.send('post', request.uri_path("exports","addons"), params, env, headers)
  
      @staticmethod
      def coupons(params=None, env=None, headers=None):
          return request.send('post', request.uri_path("exports","coupons"), params, env, headers)
  
      @staticmethod
      def customers(params=None, env=None, headers=None):
          return request.send('post', request.uri_path("exports","customers"), params, env, headers)
  
      @staticmethod
      def subscriptions(params=None, env=None, headers=None):
          return request.send('post', request.uri_path("exports","subscriptions"), params, env, headers)
  
      @staticmethod
      def invoices(params=None, env=None, headers=None):
          return request.send('post', request.uri_path("exports","invoices"), params, env, headers)
  
      @staticmethod
      def credit_notes(params=None, env=None, headers=None):
          return request.send('post', request.uri_path("exports","credit_notes"), params, env, headers)
  
      @staticmethod
      def transactions(params=None, env=None, headers=None):
          return request.send('post', request.uri_path("exports","transactions"), params, env, headers)
  
      @staticmethod
      def orders(params=None, env=None, headers=None):
          return request.send('post', request.uri_path("exports","orders"), params, env, headers)
  