text: #!/usr/bin/env python3
  # Copyright (c) 2016 The Bitcoinold Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  from decimal import Decimal
  
  from test_framework.test_framework import BitcoinoldTestFramework
  from test_framework.authproxy import JSONRPCException
  from test_framework.util import (
      assert_equal,
      assert_raises_jsonrpc,
      assert_is_hex_string,
      assert_is_hash_string,
      start_nodes,
      connect_nodes_bi,
  )
  
  
  class NamedArgumentTest(BitcoinoldTestFramework):
      """
      Test named arguments on RPC calls.
      """
  
      def __init__(self):
          super().__init__()
          self.setup_clean_chain = False
          self.num_nodes = 1
  
      def setup_network(self, split=False):
          self.nodes = start_nodes(self.num_nodes, self.options.tmpdir)
          self.is_network_split = False
          self.sync_all()
  
      def run_test(self):
          node = self.nodes[0]
          h = node.help(command='getinfo')
          assert(h.startswith('getinfo\n'))
  
          assert_raises_jsonrpc(-8, 'Unknown named parameter', node.help, random='getinfo')
  
          h = node.getblockhash(height=0)
          node.getblock(blockhash=h)
  
          assert_equal(node.echo(), [])
          assert_equal(node.echo(arg0=0,arg9=9), [0] + [None]*8 + [9])
          assert_equal(node.echo(arg1=1), [None, 1])
          assert_equal(node.echo(arg9=None), [None]*10)
          assert_equal(node.echo(arg0=0,arg3=3,arg9=9), [0] + [None]*2 + [3] + [None]*5 + [9])
  
  if __name__ == '__main__':
      NamedArgumentTest().main()
  