bts price feed error

 python3 pricefeeds.py
Traceback (most recent call last):
  File "pricefeeds.py", line 38, in <module>
    import config
  File "/home/username/bitshares-2/python-graphenelib/scripts/pricefeeds/config.py", line 201, in <module>
    wallet_port=port)
  File "/home/username/bitshares-2/python-graphenelib/scripts/pricefeeds/feedsources.py", line 641, in __init__
    self.dex   = GrapheneExchange(conn, safe_mode=False)
  File "/home/username/.local/lib/python3.5/site-packages/graphenelib-0.4.1-py3.5.egg/grapheneexchange/exchange.py", line 183, in __init__
  File "/home/username/.local/lib/python3.5/site-packages/graphenelib-0.4.1-py3.5.egg/grapheneapi/grapheneclient.py", line 358, in __init__
  File "/home/username/.local/lib/python3.5/site-packages/graphenelib-0.4.1-py3.5.egg/grapheneapi/grapheneapi.py", line 161, in method
  File "/home/username/.local/lib/python3.5/site-packages/graphenelib-0.4.1-py3.5.egg/grapheneapi/grapheneapi.py", line 147, in rpcexec
  File "/home/username/.local/lib/python3.5/site-packages/graphenelib-0.4.1-py3.5.egg/grapheneapi/grapheneapi.py", line 139, in rpcexec
grapheneapi.grapheneapi.RPCError: 10 assert_exception: Assert Exception
itr != _by_name.end(): no method with name 'get_object'
    {"name":"get_object","api":[["cancel_all_subscriptions",4],["get_24_volume",38],["get_account_balances",22],["get_account_by_name",17],["get_account_count",21],["get_account_references",18],["get_accounts",15],["get_assets",27],["get_balance_objects",24],["get_blinded_balances",58],["get_block",6],["get_block_header",5],["get_call_orders",32],["get_chain_id",12],["get_chain_properties",9],["get_committee_member_by_account",45],["get_committee_members",44],["get_config",11],["get_dynamic_global_properties",13],["get_full_accounts",16],["get_global_properties",10],["get_key_references",14],["get_limit_orders",31],["get_margin_positions",34],["get_named_account_balances",23],["get_objects",0],["get_order_book",30],["get_potential_address_signatures",52],["get_potential_signatures",51],["get_proposed_transactions",57],["get_recent_transaction_by_id",8],["get_required_fees",56],["get_required_signatures",50],["get_settle_orders",33],["get_ticker",37],["get_trade_history",39],["get_transaction",7],["get_transaction_hex",49],["get_vested_balances",25],["get_vesting_balances",26],["get_witness_by_account",41],["get_witness_count",43],["get_witnesses",40],["get_workers_by_account",47],["list_assets",28],["lookup_account_names",19],["lookup_accounts",20],["lookup_asset_symbols",29],["lookup_committee_member_accounts",46],["lookup_vote_ids",48],["lookup_witness_accounts",42],["set_block_applied_callback",3],["set_pending_transaction_callback",2],["set_subscribe_callback",1],["subscribe_to_market",35],["unsubscribe_from_market",36],["validate_transaction",55],["verify_account_authority",54],["verify_authority",53]]}
    th_a  api_connection.hpp:84 call