old_contents: #!/usr/bin/env python3
  # Copyright (c) 2019-2020 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  from test_framework.test_framework import SyscoinTestFramework
  from test_framework.util import assert_equal, assert_raises_rpc_error
  
  
  class AssetBurnTest(SyscoinTestFramework):
      def set_test_params(self):
          self.setup_clean_chain = True
          self.num_nodes = 2
          self.rpc_timeout = 240
          self.extra_args = [['-assetindex=1'],['-assetindex=1']]
  
      def run_test(self):
          self.nodes[0].generate(200)
          self.sync_blocks()
          self.basic_burn_syscoin()
          self.basic_audittxroot1()
      
      def basic_burn_syscoin(self):
          self.basic_asset()
          self.nodes[0].generate(1)
          newaddress = self.nodes[0].getnewaddress()
          self.nodes[0].assetsend(self.asset, newaddress, 0.5)
          self.nodes[0].generate(1)
          out =  self.nodes[0].listunspent(query_options={'assetGuid': self.asset})
          assert_equal(len(out), 1)
          # try to burn more than we own
          assert_raises_rpc_error(-20, 'Failed to read from asset DB', self.nodes[0].assetallocationburn(self.asset, newaddress, 0.6, '0x931d387731bbbc988b312206c74f77d004d6b84b'))
          self.nodes[0].assetallocationburn(self.asset, newaddress, 0.5, '0x931d387731bbbc988b312206c74f77d004d6b84b')
          self.nodes[0].generate(1)
          out =  self.nodes[0].listunspent(query_options={'assetGuid': self.asset})
          assert_equal(len(out), 0)
  
      def basic_asset(self):
          self.asset = self.nodes[0].assetnew('1', 'TST', 'asset description', '0x9f90b5093f35aeac5fbaeb591f9c9de8e2844a46', 8, '1000', '10000', 31, {})['asset_guid']
  
  
  
  if __name__ == '__main__':
      AssetBurnTest().main()
  
new_contents: #!/usr/bin/env python3
  # Copyright (c) 2019-2020 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  from test_framework.test_framework import SyscoinTestFramework
  from test_framework.util import assert_equal, assert_raises_rpc_error
  
  
  class AssetBurnTest(SyscoinTestFramework):
      def set_test_params(self):
          self.setup_clean_chain = True
          self.num_nodes = 2
          self.rpc_timeout = 240
          self.extra_args = [['-assetindex=1'],['-assetindex=1']]
  
      def run_test(self):
          self.nodes[0].generate(200)
          self.sync_blocks()
          self.basic_burn_syscoin()
          self.basic_audittxroot1()
      
      def basic_burn_syscoin(self):
          self.basic_asset()
          self.nodes[0].generate(1)
          newaddress = self.nodes[0].getnewaddress()
          self.nodes[0].assetsend(self.asset, newaddress, '0.5')
          self.nodes[0].generate(1)
          out =  self.nodes[0].listunspent(query_options={'assetGuid': self.asset})
          assert_equal(len(out), 1)
          # try to burn more than we own
          assert_raises_rpc_error(-20, 'Failed to read from asset DB', self.nodes[0].assetallocationburn(self.asset, newaddress, '0.6', '0x931d387731bbbc988b312206c74f77d004d6b84b'))
          self.nodes[0].assetallocationburn(self.asset, newaddress, '0.5', '0x931d387731bbbc988b312206c74f77d004d6b84b')
          self.nodes[0].generate(1)
          out =  self.nodes[0].listunspent(query_options={'assetGuid': self.asset})
          assert_equal(len(out), 0)
  
      def basic_asset(self):
          self.asset = self.nodes[0].assetnew('1', 'TST', 'asset description', '0x9f90b5093f35aeac5fbaeb591f9c9de8e2844a46', 8, '1000', '10000', 31, {})['asset_guid']
  
  
  
  if __name__ == '__main__':
      AssetBurnTest().main()
  
subject: use str