old_contents: #!/usr/bin/env python3
  # Copyright (c) 2015-2017 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  """Test node responses to invalid transactions.
  
  In this test we connect to one node over p2p, and test tx requests.
  """
  
  from test_framework.test_framework import ComparisonTestFramework
  from test_framework.comptool import TestManager, TestInstance, RejectResult
  from test_framework.blocktools import *
  import time
  
  
  
  # Use the ComparisonTestFramework with 1 node: only use --testbinary.
  class InvalidTxRequestTest(ComparisonTestFramework):
  
      ''' Can either run this test as 1 node with expected answers, or two and compare them. 
          Change the "outcome" variable from each TestInstance object to only do the comparison. '''
      def set_test_params(self):
          self.num_nodes = 1
          self.setup_clean_chain = True
  
      def run_test(self):
          test = TestManager(self, self.options.tmpdir)
          test.add_all_connections(self.nodes)
          self.tip = None
          self.block_time = None
          network_thread_start()
          test.run()
  
      def get_tests(self):
          if self.tip is None:
              self.tip = int("0x" + self.nodes[0].getbestblockhash(), 0)
          self.block_time = int(time.time())+1
  
          '''
          Create a new block with an anyone-can-spend coinbase
          '''
          height = 1
          block = create_block(self.tip, create_coinbase(height), self.block_time)
          self.block_time += 1
          block.solve()
          # Save the coinbase for later
          self.block1 = block
          self.tip = block.sha256
          height += 1
          yield TestInstance([[block, True]])
  
          '''
          Now we need that block to mature so we can spend the coinbase.
          '''
          test = TestInstance(sync_every_block=False)
          for i in range(100):
              block = create_block(self.tip, create_coinbase(height), self.block_time)
              block.solve()
              self.tip = block.sha256
              self.block_time += 1
              test.blocks_and_transactions.append([block, True])
              height += 1
          yield test
  
          # b'\x64' is OP_NOTIF
          # Transaction will be rejected with code 16 (REJECT_INVALID)
          tx1 = create_transaction(self.block1.vtx[0], 0, b'\x64' * 35, 50 * COIN - 12000)
          yield TestInstance([[tx1, RejectResult(16, b'mandatory-script-verify-flag-failed')]])
  
          # TODO: test further transactions...
  
  if __name__ == '__main__':
      InvalidTxRequestTest().main()
  
new_contents: #!/usr/bin/env python3
  # Copyright (c) 2015-2017 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  """Test node responses to invalid transactions.
  
  In this test we connect to one node over p2p, and test tx requests."""
  import time
  
  from test_framework.blocktools import create_block, create_coinbase, create_transaction
  from test_framework.comptool import RejectResult, TestInstance, TestManager
  from test_framework.messages import COIN
  from test_framework.mininode import network_thread_start
  from test_framework.test_framework import ComparisonTestFramework
  
  class InvalidTxRequestTest(ComparisonTestFramework):
  
      def set_test_params(self):
          self.num_nodes = 1
          self.setup_clean_chain = True
  
      def run_test(self):
          test = TestManager(self, self.options.tmpdir)
          test.add_all_connections(self.nodes)
          self.tip = None
          self.block_time = None
          network_thread_start()
          test.run()
  
      def get_tests(self):
          self.tip = int("0x" + self.nodes[0].getbestblockhash(), 0)
          self.block_time = int(time.time()) + 1
  
          self.log.info("Create a new block with an anyone-can-spend coinbase.")
          height = 1
          block = create_block(self.tip, create_coinbase(height), self.block_time)
          self.block_time += 1
          block.solve()
          # Save the coinbase for later
          self.block1 = block
          self.tip = block.sha256
          height += 1
          yield TestInstance([[block, True]])
  
          self.log.info("Mature the block.")
          test = TestInstance(sync_every_block=False)
          for i in range(100):
              block = create_block(self.tip, create_coinbase(height), self.block_time)
              block.solve()
              self.tip = block.sha256
              self.block_time += 1
              test.blocks_and_transactions.append([block, True])
              height += 1
          yield test
  
          # b'\x64' is OP_NOTIF
          # Transaction will be rejected with code 16 (REJECT_INVALID)
          tx1 = create_transaction(self.block1.vtx[0], 0, b'\x64' * 35, 50 * COIN - 12000)
          yield TestInstance([[tx1, RejectResult(16, b'mandatory-script-verify-flag-failed')]])
  
          # TODO: test further transactions...
  
  if __name__ == '__main__':
      InvalidTxRequestTest().main()
  
subject: Fix flake8 warnings in invalidtxrequest