diff --git a/jmbase/jmbase/__init__.py b/jmbase/jmbase/__init__.py
index c34966b..ad3931e 100644
--- a/jmbase/jmbase/__init__.py
+++ b/jmbase/jmbase/__init__.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 
 from .support import (get_log, chunks, debug_silence, jmprint,
                       joinmarket_alert, core_alert, get_password,
diff --git a/jmbase/jmbase/bigstring.py b/jmbase/jmbase/bigstring.py
index ecfe9cc..6847c36 100644
--- a/jmbase/jmbase/bigstring.py
+++ b/jmbase/jmbase/bigstring.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 import itertools
 from twisted.protocols import amp
 
diff --git a/jmbase/jmbase/commands.py b/jmbase/jmbase/commands.py
index 21eb24c..7f00dd6 100644
--- a/jmbase/jmbase/commands.py
+++ b/jmbase/jmbase/commands.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 """
 Commands defining client-server (daemon)
 messaging protocol (*not* Joinmarket p2p protocol).
diff --git a/jmbase/jmbase/support.py b/jmbase/jmbase/support.py
index ecfc0bd..1206c64 100644
--- a/jmbase/jmbase/support.py
+++ b/jmbase/jmbase/support.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 import logging
 from getpass import getpass
diff --git a/jmbase/setup.py b/jmbase/setup.py
index 000a079..6501642 100644
--- a/jmbase/setup.py
+++ b/jmbase/setup.py
@@ -11,4 +11,5 @@ setup(name='joinmarketbase',
       packages=['jmbase'],
       install_requires=['future', 'twisted==19.7.0', 'service-identity',
                         'chromalog==1.0.5'],
+      python_requires='>=3.3',
       zip_safe=False)
diff --git a/jmbase/test/test_base_support.py b/jmbase/test/test_base_support.py
index f086524..7730dde 100644
--- a/jmbase/test/test_base_support.py
+++ b/jmbase/test/test_base_support.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 def test_color_coded_logging():
     # TODO
diff --git a/jmbase/test/test_commands.py b/jmbase/test/test_commands.py
index 70dac85..bc43792 100644
--- a/jmbase/test/test_commands.py
+++ b/jmbase/test/test_commands.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 from twisted.internet import protocol, reactor, task
 from twisted.internet.error import (ConnectionLost, ConnectionAborted,
                                     ConnectionClosed, ConnectionDone)
diff --git a/jmbitcoin/jmbitcoin/__init__.py b/jmbitcoin/jmbitcoin/__init__.py
index c4a8d32..7db6dc1 100644
--- a/jmbitcoin/jmbitcoin/__init__.py
+++ b/jmbitcoin/jmbitcoin/__init__.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 import coincurve as secp256k1
 from jmbitcoin.secp256k1_main import *
 from jmbitcoin.secp256k1_transaction import *
diff --git a/jmbitcoin/jmbitcoin/bech32.py b/jmbitcoin/jmbitcoin/bech32.py
index 36f3202..8d3f9bf 100644
--- a/jmbitcoin/jmbitcoin/bech32.py
+++ b/jmbitcoin/jmbitcoin/bech32.py
@@ -19,9 +19,6 @@
 # THE SOFTWARE.
 
 """Reference implementation for Bech32 and segwit addresses."""
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
 
diff --git a/jmbitcoin/jmbitcoin/btscript.py b/jmbitcoin/jmbitcoin/btscript.py
index 4ef74be..c658c4e 100644
--- a/jmbitcoin/jmbitcoin/btscript.py
+++ b/jmbitcoin/jmbitcoin/btscript.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 #OP codes; disabled commented.
 
 # push value
diff --git a/jmbitcoin/jmbitcoin/secp256k1_deterministic.py b/jmbitcoin/jmbitcoin/secp256k1_deterministic.py
index 1407769..fea699f 100644
--- a/jmbitcoin/jmbitcoin/secp256k1_deterministic.py
+++ b/jmbitcoin/jmbitcoin/secp256k1_deterministic.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 from jmbitcoin.secp256k1_main import *
 import hmac
 import hashlib
diff --git a/jmbitcoin/jmbitcoin/secp256k1_main.py b/jmbitcoin/jmbitcoin/secp256k1_main.py
index ff839fe..931b424 100644
--- a/jmbitcoin/jmbitcoin/secp256k1_main.py
+++ b/jmbitcoin/jmbitcoin/secp256k1_main.py
@@ -1,7 +1,4 @@
 #!/usr/bin/python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import native_bytes, bytes_to_native_str
 import binascii
 import hashlib
diff --git a/jmbitcoin/jmbitcoin/secp256k1_transaction.py b/jmbitcoin/jmbitcoin/secp256k1_transaction.py
index eb5c5f3..5436c74 100644
--- a/jmbitcoin/jmbitcoin/secp256k1_transaction.py
+++ b/jmbitcoin/jmbitcoin/secp256k1_transaction.py
@@ -1,7 +1,4 @@
 #!/usr/bin/python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 from past.builtins import basestring
 from io import BytesIO
 import binascii
diff --git a/jmbitcoin/test/test_addresses.py b/jmbitcoin/test/test_addresses.py
index 810f464..d7723b1 100644
--- a/jmbitcoin/test/test_addresses.py
+++ b/jmbitcoin/test/test_addresses.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 import jmbitcoin as btc
 import json
 import pytest
diff --git a/jmbitcoin/test/test_bech32.py b/jmbitcoin/test/test_bech32.py
index a0d0d51..ec5de0d 100644
--- a/jmbitcoin/test/test_bech32.py
+++ b/jmbitcoin/test/test_bech32.py
@@ -1,7 +1,4 @@
 #!/usr/bin/python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 # Copyright (c) 2017 Pieter Wuille
 #
diff --git a/jmbitcoin/test/test_bip32.py b/jmbitcoin/test/test_bip32.py
index d26c07b..d0eb5b1 100644
--- a/jmbitcoin/test/test_bip32.py
+++ b/jmbitcoin/test/test_bip32.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 import pytest
 import jmbitcoin as btc
 import binascii
diff --git a/jmbitcoin/test/test_btc_formatting.py b/jmbitcoin/test/test_btc_formatting.py
index cc15276..66475d5 100644
--- a/jmbitcoin/test/test_btc_formatting.py
+++ b/jmbitcoin/test/test_btc_formatting.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Test bitcoin module data handling'''
 
 import jmbitcoin as btc
diff --git a/jmbitcoin/test/test_ecc_signing.py b/jmbitcoin/test/test_ecc_signing.py
index 0c5b9d8..570a292 100644
--- a/jmbitcoin/test/test_ecc_signing.py
+++ b/jmbitcoin/test/test_ecc_signing.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Test ECDSA signing and other key operations, including legacy message
 signature conversion.'''
 
diff --git a/jmbitcoin/test/test_keys.py b/jmbitcoin/test/test_keys.py
index 4514630..06c48fd 100644
--- a/jmbitcoin/test/test_keys.py
+++ b/jmbitcoin/test/test_keys.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Public and private key validity and formatting tests.'''
 
 import jmbitcoin as btc
diff --git a/jmbitcoin/test/test_main.py b/jmbitcoin/test/test_main.py
index 61a7dda..5f2bf10 100644
--- a/jmbitcoin/test/test_main.py
+++ b/jmbitcoin/test/test_main.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Testing mostly exceptional cases in secp256k1_main.
    Some of these may represent code that should be removed, TODO.'''
 
diff --git a/jmbitcoin/test/test_tx_serialize.py b/jmbitcoin/test/test_tx_serialize.py
index e145a87..225ee5d 100644
--- a/jmbitcoin/test/test_tx_serialize.py
+++ b/jmbitcoin/test/test_tx_serialize.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 import jmbitcoin as btc
 import pytest
 import json
diff --git a/jmclient/jmclient/__init__.py b/jmclient/jmclient/__init__.py
index 9397197..04d5aa4 100644
--- a/jmclient/jmclient/__init__.py
+++ b/jmclient/jmclient/__init__.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 
 import logging
 
diff --git a/jmclient/jmclient/blockchaininterface.py b/jmclient/jmclient/blockchaininterface.py
index 4b3b285..12fda22 100644
--- a/jmclient/jmclient/blockchaininterface.py
+++ b/jmclient/jmclient/blockchaininterface.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 import abc
 import random
diff --git a/jmclient/jmclient/cli_options.py b/jmclient/jmclient/cli_options.py
index c9f9bda..f64e6ac 100644
--- a/jmclient/jmclient/cli_options.py
+++ b/jmclient/jmclient/cli_options.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 import random
 from optparse import OptionParser, OptionValueError
 from configparser import NoOptionError
diff --git a/jmclient/jmclient/client_protocol.py b/jmclient/jmclient/client_protocol.py
index 4aabca8..8783cfc 100644
--- a/jmclient/jmclient/client_protocol.py
+++ b/jmclient/jmclient/client_protocol.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 from twisted.internet import protocol, reactor, task
 from twisted.internet.error import (ConnectionLost, ConnectionAborted,
diff --git a/jmclient/jmclient/commitment_utils.py b/jmclient/jmclient/commitment_utils.py
index fb67b72..64a80c4 100644
--- a/jmclient/jmclient/commitment_utils.py
+++ b/jmclient/jmclient/commitment_utils.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 import sys
 import jmbitcoin as btc
diff --git a/jmclient/jmclient/configure.py b/jmclient/jmclient/configure.py
index cfd9160..28170b4 100644
--- a/jmclient/jmclient/configure.py
+++ b/jmclient/jmclient/configure.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 import io
 import logging
diff --git a/jmclient/jmclient/cryptoengine.py b/jmclient/jmclient/cryptoengine.py
index 3a434f3..0889d05 100644
--- a/jmclient/jmclient/cryptoengine.py
+++ b/jmclient/jmclient/cryptoengine.py
@@ -1,9 +1,6 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 
-from binascii import unhexlify
+from binascii import hexlify, unhexlify
 from collections import OrderedDict
 import struct
 
diff --git a/jmclient/jmclient/electrum_data.py b/jmclient/jmclient/electrum_data.py
index d45d9d0..393f49c 100644
--- a/jmclient/jmclient/electrum_data.py
+++ b/jmclient/jmclient/electrum_data.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 # Default server list from electrum client
 # https://github.com/spesmilo/electrum, file https://github.com/spesmilo/electrum/blob/7dbd612d5dad13cd6f1c0df32534a578bad331ad/lib/servers.json
 
diff --git a/jmclient/jmclient/electruminterface.py b/jmclient/jmclient/electruminterface.py
index 734ba56..6327a98 100644
--- a/jmclient/jmclient/electruminterface.py
+++ b/jmclient/jmclient/electruminterface.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 import jmbitcoin as btc
 import json
diff --git a/jmclient/jmclient/jsonrpc.py b/jmclient/jmclient/jsonrpc.py
index b944912..ad8b1d2 100644
--- a/jmclient/jmclient/jsonrpc.py
+++ b/jmclient/jmclient/jsonrpc.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 # Copyright (C) 2013,2015 by Daniel Kraft <d@domob.eu>
 # Copyright (C) 2014 by phelix / blockchained.com
 #
diff --git a/jmclient/jmclient/maker.py b/jmclient/jmclient/maker.py
index 3dcae54..5a3c6f3 100644
--- a/jmclient/jmclient/maker.py
+++ b/jmclient/jmclient/maker.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 import base64
 import pprint
diff --git a/jmclient/jmclient/old_mnemonic.py b/jmclient/jmclient/old_mnemonic.py
index df8937c..c4be053 100644
--- a/jmclient/jmclient/old_mnemonic.py
+++ b/jmclient/jmclient/old_mnemonic.py
@@ -1,7 +1,4 @@
 #!/usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 #
 # Electrum - lightweight Bitcoin client
 # Copyright (C) 2011 thomasv@gitorious
diff --git a/jmclient/jmclient/output.py b/jmclient/jmclient/output.py
index 94ea565..7242aec 100644
--- a/jmclient/jmclient/output.py
+++ b/jmclient/jmclient/output.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from binascii import hexlify
 
 
diff --git a/jmclient/jmclient/podle.py b/jmclient/jmclient/podle.py
index fddec11..eff5dcc 100644
--- a/jmclient/jmclient/podle.py
+++ b/jmclient/jmclient/podle.py
@@ -1,7 +1,4 @@
 #!/usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 #Proof Of Discrete Logarithm Equivalence
 #For algorithm steps, see https://gist.github.com/AdamISZ/9cbba5e9408d23813ca8
 import os
diff --git a/jmclient/jmclient/schedule.py b/jmclient/jmclient/schedule.py
index 31b7543..92890fc 100644
--- a/jmclient/jmclient/schedule.py
+++ b/jmclient/jmclient/schedule.py
@@ -1,7 +1,4 @@
 #!/usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 import copy
 import random
 import sys
diff --git a/jmclient/jmclient/storage.py b/jmclient/jmclient/storage.py
index 48c7d40..5ff0ce7 100644
--- a/jmclient/jmclient/storage.py
+++ b/jmclient/jmclient/storage.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import native
 
 import os
diff --git a/jmclient/jmclient/support.py b/jmclient/jmclient/support.py
index 583e851..bdf601c 100644
--- a/jmclient/jmclient/support.py
+++ b/jmclient/jmclient/support.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from functools import reduce
 import random
 from jmbase.support import get_log
diff --git a/jmclient/jmclient/taker.py b/jmclient/jmclient/taker.py
index c8c95fc..22d1e44 100644
--- a/jmclient/jmclient/taker.py
+++ b/jmclient/jmclient/taker.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 
 import base64
diff --git a/jmclient/jmclient/taker_utils.py b/jmclient/jmclient/taker_utils.py
index 94ffe53..6c0cfd6 100644
--- a/jmclient/jmclient/taker_utils.py
+++ b/jmclient/jmclient/taker_utils.py
@@ -1,14 +1,13 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 import logging
 import pprint
 import os
+import sys
 import time
 import numbers
 from jmbase import get_log, jmprint
 from .configure import jm_single, validate_address
+from .jsonrpc import JsonRpcError
 from .schedule import human_readable_schedule_entry, tweak_tumble_schedule,\
     schedule_to_text
 from .wallet import BaseWallet, estimate_tx_fee, compute_tx_locktime
diff --git a/jmclient/jmclient/wallet.py b/jmclient/jmclient/wallet.py
index 04ce77f..7385aa1 100644
--- a/jmclient/jmclient/wallet.py
+++ b/jmclient/jmclient/wallet.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 from configparser import NoOptionError
 import warnings
diff --git a/jmclient/jmclient/wallet_service.py b/jmclient/jmclient/wallet_service.py
index 186b26b..04dbf48 100644
--- a/jmclient/jmclient/wallet_service.py
+++ b/jmclient/jmclient/wallet_service.py
@@ -1,6 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
 
 import collections
 import time
diff --git a/jmclient/jmclient/wallet_utils.py b/jmclient/jmclient/wallet_utils.py
index a6af243..f359864 100644
--- a/jmclient/jmclient/wallet_utils.py
+++ b/jmclient/jmclient/wallet_utils.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 import json
 import os
diff --git a/jmclient/jmclient/yieldgenerator.py b/jmclient/jmclient/yieldgenerator.py
index 5e1eac9..92c7cee 100644
--- a/jmclient/jmclient/yieldgenerator.py
+++ b/jmclient/jmclient/yieldgenerator.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 
 import datetime
diff --git a/jmclient/setup.py b/jmclient/setup.py
index afb4a42..fc28f0d 100644
--- a/jmclient/setup.py
+++ b/jmclient/setup.py
@@ -12,4 +12,5 @@ setup(name='joinmarketclient',
       install_requires=['future', 'configparser;python_version<"3.2"',
                         'joinmarketbase==0.6.1', 'mnemonic', 'argon2_cffi',
                         'bencoder.pyx>=2.0.0', 'pyaes'],
+      python_requires='>=3.3',
       zip_safe=False)
diff --git a/jmclient/test/commontest.py b/jmclient/test/commontest.py
index ee5507e..463c97b 100644
--- a/jmclient/test/commontest.py
+++ b/jmclient/test/commontest.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Some helper functions for testing'''
 
 import os
diff --git a/jmclient/test/taker_test_data.py b/jmclient/test/taker_test_data.py
index 7a6195d..0ee3c09 100644
--- a/jmclient/test/taker_test_data.py
+++ b/jmclient/test/taker_test_data.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 #orderbook
 t_orderbook = [{u'counterparty': u'J6FA1Gj7Ln4vSGne', u'ordertype': u'swreloffer', u'oid': 0,
   u'minsize': 7500000, u'txfee': 1000, u'maxsize': 599972700, u'cjfee': u'0.0002'},
diff --git a/jmclient/test/test_argon2.py b/jmclient/test/test_argon2.py
index 8ad11c2..1f7267b 100644
--- a/jmclient/test/test_argon2.py
+++ b/jmclient/test/test_argon2.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 from jmclient import Argon2Hash, get_random_bytes
 
diff --git a/jmclient/test/test_blockchaininterface.py b/jmclient/test/test_blockchaininterface.py
index 7cd73e0..6cc9124 100644
--- a/jmclient/test/test_blockchaininterface.py
+++ b/jmclient/test/test_blockchaininterface.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 """Blockchaininterface functionality tests."""
 
diff --git a/jmclient/test/test_client_protocol.py b/jmclient/test/test_client_protocol.py
index 5176877..0ced712 100644
--- a/jmclient/test/test_client_protocol.py
+++ b/jmclient/test/test_client_protocol.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 '''test client-protocol interfacae.'''
 
 from jmbase import get_log
diff --git a/jmclient/test/test_coinjoin.py b/jmclient/test/test_coinjoin.py
index 4e18430..6428a2b 100644
--- a/jmclient/test/test_coinjoin.py
+++ b/jmclient/test/test_coinjoin.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 """
 Test doing full coinjoins, bypassing IRC
diff --git a/jmclient/test/test_commitment_utils.py b/jmclient/test/test_commitment_utils.py
index 96ee1fd..31000ab 100644
--- a/jmclient/test/test_commitment_utils.py
+++ b/jmclient/test/test_commitment_utils.py
@@ -1,7 +1,4 @@
 #!/usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from commontest import DummyBlockchainInterface
 import pytest
 
diff --git a/jmclient/test/test_configure.py b/jmclient/test/test_configure.py
index ad5c9aa..cb488d2 100644
--- a/jmclient/test/test_configure.py
+++ b/jmclient/test/test_configure.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''test configure module.'''
 
 import pytest
diff --git a/jmclient/test/test_core_nohistory_sync.py b/jmclient/test/test_core_nohistory_sync.py
index 51d4f23..ded8eb1 100644
--- a/jmclient/test/test_core_nohistory_sync.py
+++ b/jmclient/test/test_core_nohistory_sync.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Wallet functionality tests.'''
 
 """BitcoinCoreNoHistoryInterface functionality tests."""
diff --git a/jmclient/test/test_maker.py b/jmclient/test/test_maker.py
index 77b239d..1bc53e9 100644
--- a/jmclient/test/test_maker.py
+++ b/jmclient/test/test_maker.py
@@ -1,9 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
-
 import jmbitcoin as btc
 from jmclient import Maker, get_p2sh_vbyte, get_p2pk_vbyte, \
     load_test_config, jm_single, WalletService
diff --git a/jmclient/test/test_mnemonic.py b/jmclient/test/test_mnemonic.py
index 40772f1..15a28e2 100644
--- a/jmclient/test/test_mnemonic.py
+++ b/jmclient/test/test_mnemonic.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from jmclient import old_mnemonic
 
 import pytest
diff --git a/jmclient/test/test_payjoin.py b/jmclient/test/test_payjoin.py
index ec5cd14..3670100 100644
--- a/jmclient/test/test_payjoin.py
+++ b/jmclient/test/test_payjoin.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 """
 Test doing payjoin joins (with message channel layer mocked)
diff --git a/jmclient/test/test_podle.py b/jmclient/test/test_podle.py
index 1d47c6b..d49fe80 100644
--- a/jmclient/test/test_podle.py
+++ b/jmclient/test/test_podle.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Tests of Proof of discrete log equivalence commitments.'''
 import os
 import jmbitcoin as bitcoin
diff --git a/jmclient/test/test_schedule.py b/jmclient/test/test_schedule.py
index 04667b1..fbd8dfa 100644
--- a/jmclient/test/test_schedule.py
+++ b/jmclient/test/test_schedule.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''test schedule module.'''
 
 import pytest
diff --git a/jmclient/test/test_storage.py b/jmclient/test/test_storage.py
index 313e277..11e4894 100644
--- a/jmclient/test/test_storage.py
+++ b/jmclient/test/test_storage.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 from jmclient import storage
 import pytest
diff --git a/jmclient/test/test_support.py b/jmclient/test/test_support.py
index 2df4d9f..cbd93b6 100644
--- a/jmclient/test/test_support.py
+++ b/jmclient/test/test_support.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''support functions for jmclient tests.'''
 
 import pytest
diff --git a/jmclient/test/test_taker.py b/jmclient/test/test_taker.py
index 660424d..bc00d78 100644
--- a/jmclient/test/test_taker.py
+++ b/jmclient/test/test_taker.py
@@ -1,7 +1,4 @@
 #!/usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 from commontest import DummyBlockchainInterface
 import jmbitcoin as bitcoin
diff --git a/jmclient/test/test_tx_creation.py b/jmclient/test/test_tx_creation.py
index 5f61237..d50997d 100644
--- a/jmclient/test/test_tx_creation.py
+++ b/jmclient/test/test_tx_creation.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Test of unusual transaction types creation and push to
 network to check validity.'''
 
diff --git a/jmclient/test/test_utxomanager.py b/jmclient/test/test_utxomanager.py
index bc4a2f3..2d3023f 100644
--- a/jmclient/test/test_utxomanager.py
+++ b/jmclient/test/test_utxomanager.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 from jmclient.wallet import UTXOManager
 from test_storage import MockStorage
diff --git a/jmclient/test/test_valid_addresses.py b/jmclient/test/test_valid_addresses.py
index 8719d21..a3d8238 100644
--- a/jmclient/test/test_valid_addresses.py
+++ b/jmclient/test/test_valid_addresses.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from jmclient.configure import validate_address, load_test_config
 from jmclient import jm_single
 import json
diff --git a/jmclient/test/test_wallet.py b/jmclient/test/test_wallet.py
index f9f255e..949ca2e 100644
--- a/jmclient/test/test_wallet.py
+++ b/jmclient/test/test_wallet.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Wallet functionality tests.'''
 
 import os
diff --git a/jmclient/test/test_wallets.py b/jmclient/test/test_wallets.py
index b3083a5..66d6058 100644
--- a/jmclient/test/test_wallets.py
+++ b/jmclient/test/test_wallets.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Wallet functionality tests.'''
 
 import os
diff --git a/jmclient/test/test_walletservice.py b/jmclient/test/test_walletservice.py
index 5ef3ac5..a652a40 100644
--- a/jmclient/test/test_walletservice.py
+++ b/jmclient/test/test_walletservice.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Tests of functionality at walletservice layer.'''
 
 import os
diff --git a/jmclient/test/test_yieldgenerator.py b/jmclient/test/test_yieldgenerator.py
index fda5bc9..2fd2539 100644
--- a/jmclient/test/test_yieldgenerator.py
+++ b/jmclient/test/test_yieldgenerator.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 import unittest
 
diff --git a/jmdaemon/jmdaemon/__init__.py b/jmdaemon/jmdaemon/__init__.py
index d4b3c3f..bc7b08b 100644
--- a/jmdaemon/jmdaemon/__init__.py
+++ b/jmdaemon/jmdaemon/__init__.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 
 import logging
 from .protocol import *
diff --git a/jmdaemon/jmdaemon/daemon_protocol.py b/jmdaemon/jmdaemon/daemon_protocol.py
index 93deee1..0e502db 100644
--- a/jmdaemon/jmdaemon/daemon_protocol.py
+++ b/jmdaemon/jmdaemon/daemon_protocol.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 from future.utils import iteritems
 
 from .message_channel import MessageChannelCollection
diff --git a/jmdaemon/jmdaemon/enc_wrapper.py b/jmdaemon/jmdaemon/enc_wrapper.py
index d4244b5..98510a7 100644
--- a/jmdaemon/jmdaemon/enc_wrapper.py
+++ b/jmdaemon/jmdaemon/enc_wrapper.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 # A wrapper for public key
 # authenticated encryption
diff --git a/jmdaemon/jmdaemon/irc.py b/jmdaemon/jmdaemon/irc.py
index eb80a6a..9e75037 100644
--- a/jmdaemon/jmdaemon/irc.py
+++ b/jmdaemon/jmdaemon/irc.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 
 #TODO: SSL support (can it be done without back-end openssl?)
 from twisted.internet import reactor, protocol
diff --git a/jmdaemon/jmdaemon/message_channel.py b/jmdaemon/jmdaemon/message_channel.py
index 424f0db..2e826ac 100644
--- a/jmdaemon/jmdaemon/message_channel.py
+++ b/jmdaemon/jmdaemon/message_channel.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 import abc
 import base64
diff --git a/jmdaemon/jmdaemon/orderbookwatch.py b/jmdaemon/jmdaemon/orderbookwatch.py
index 53e02c6..566ffb5 100644
--- a/jmdaemon/jmdaemon/orderbookwatch.py
+++ b/jmdaemon/jmdaemon/orderbookwatch.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 import sqlite3
 import sys
diff --git a/jmdaemon/jmdaemon/protocol.py b/jmdaemon/jmdaemon/protocol.py
index 25b5581..9920e2c 100644
--- a/jmdaemon/jmdaemon/protocol.py
+++ b/jmdaemon/jmdaemon/protocol.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 #Protocol version
 JM_VERSION = 5
 
diff --git a/jmdaemon/jmdaemon/socks.py b/jmdaemon/jmdaemon/socks.py
index 9b5d248..b2f3990 100644
--- a/jmdaemon/jmdaemon/socks.py
+++ b/jmdaemon/jmdaemon/socks.py
@@ -29,9 +29,6 @@ This module provides a standard socket-like interface for Python
 for tunneling connections through SOCKS proxies.
 
 """
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 import socket
 import struct
 import random
diff --git a/jmdaemon/setup.py b/jmdaemon/setup.py
index 1a90a03..3116562 100644
--- a/jmdaemon/setup.py
+++ b/jmdaemon/setup.py
@@ -10,4 +10,5 @@ setup(name='joinmarketdaemon',
       license='GPL',
       packages=['jmdaemon'],
       install_requires=['future', 'txtorcon', 'pyopenssl', 'libnacl', 'joinmarketbase==0.6.1'],
+      python_requires='>=3.3',
       zip_safe=False)
diff --git a/jmdaemon/test/dummy_mc.py b/jmdaemon/test/dummy_mc.py
index 4142624..2beae98 100644
--- a/jmdaemon/test/dummy_mc.py
+++ b/jmdaemon/test/dummy_mc.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 
 import time
 
diff --git a/jmdaemon/test/msgdata.py b/jmdaemon/test/msgdata.py
index 7d68aec..0b3dc67 100644
--- a/jmdaemon/test/msgdata.py
+++ b/jmdaemon/test/msgdata.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 #orderbook
 t_orderbook = [{u'counterparty': u'J5FA1Gj7Ln4vSGne', u'ordertype': u'reloffer', u'oid': 0,
   u'minsize': 7500000, u'txfee': 1000, u'maxsize': 599972700, u'cjfee': u'0.0002'},
diff --git a/jmdaemon/test/test_daemon_protocol.py b/jmdaemon/test/test_daemon_protocol.py
index 1ddd709..321d548 100644
--- a/jmdaemon/test/test_daemon_protocol.py
+++ b/jmdaemon/test/test_daemon_protocol.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 from future.utils import iteritems
 '''test daemon-protocol interfacae.'''
 
diff --git a/jmdaemon/test/test_enc_wrapper.py b/jmdaemon/test/test_enc_wrapper.py
index 46d6084..74c3bae 100644
--- a/jmdaemon/test/test_enc_wrapper.py
+++ b/jmdaemon/test/test_enc_wrapper.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 import base64
 import string
 import random
diff --git a/jmdaemon/test/test_irc_messaging.py b/jmdaemon/test/test_irc_messaging.py
index 5cb28ce..cca5373 100644
--- a/jmdaemon/test/test_irc_messaging.py
+++ b/jmdaemon/test/test_irc_messaging.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Tests of joinmarket bots end-to-end (including IRC and bitcoin) '''
 
 import time
diff --git a/jmdaemon/test/test_message_channel.py b/jmdaemon/test/test_message_channel.py
index e4847f9..617ca9c 100644
--- a/jmdaemon/test/test_message_channel.py
+++ b/jmdaemon/test/test_message_channel.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 '''test messagechannel management code.'''
 
 import pytest
diff --git a/jmdaemon/test/test_orderbookwatch.py b/jmdaemon/test/test_orderbookwatch.py
index 088b569..7157fab 100644
--- a/jmdaemon/test/test_orderbookwatch.py
+++ b/jmdaemon/test/test_orderbookwatch.py
@@ -1,7 +1,4 @@
 #!/usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 import pytest
 
diff --git a/scripts/add-utxo.py b/scripts/add-utxo.py
index bb93cf9..76e3265 100644
--- a/scripts/add-utxo.py
+++ b/scripts/add-utxo.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 """A very simple command line tool to import utxos to be used
 as commitments into joinmarket's commitments.json file, allowing
diff --git a/scripts/convert_old_wallet.py b/scripts/convert_old_wallet.py
index d356807..c5478ee 100644
--- a/scripts/convert_old_wallet.py
+++ b/scripts/convert_old_wallet.py
@@ -1,7 +1,4 @@
 #!/usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 import argparse
 import json
 import os.path
diff --git a/scripts/joinmarket-qt.py b/scripts/joinmarket-qt.py
index 3e03dd9..90e6898 100644
--- a/scripts/joinmarket-qt.py
+++ b/scripts/joinmarket-qt.py
@@ -1,7 +1,4 @@
 #!/usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 from future.utils import iteritems
 
 '''
diff --git a/scripts/joinmarketd.py b/scripts/joinmarketd.py
index 8397163..8296408 100644
--- a/scripts/joinmarketd.py
+++ b/scripts/joinmarketd.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 import sys
 from twisted.internet import reactor
 from twisted.python.log import startLogging
diff --git a/scripts/obwatch/ob-watcher.py b/scripts/obwatch/ob-watcher.py
index 0263140..4c102b2 100644
--- a/scripts/obwatch/ob-watcher.py
+++ b/scripts/obwatch/ob-watcher.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 from future.utils import iteritems
 from past.builtins import cmp
 from functools import cmp_to_key
diff --git a/scripts/qtsupport.py b/scripts/qtsupport.py
index e3f5fc3..08e78a9 100644
--- a/scripts/qtsupport.py
+++ b/scripts/qtsupport.py
@@ -1,7 +1,4 @@
 #!/usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
 
 '''
 Qt files for the wizard for initiating a tumbler run.
diff --git a/scripts/receive-payjoin.py b/scripts/receive-payjoin.py
index 115e321..4123c84 100644
--- a/scripts/receive-payjoin.py
+++ b/scripts/receive-payjoin.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 from optparse import OptionParser
 
diff --git a/scripts/sendpayment.py b/scripts/sendpayment.py
index c941f74..7d7590e 100644
--- a/scripts/sendpayment.py
+++ b/scripts/sendpayment.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 """
 A sample implementation of a single coinjoin script,
diff --git a/scripts/sendtomany.py b/scripts/sendtomany.py
index f002f8c..5a70ed2 100644
--- a/scripts/sendtomany.py
+++ b/scripts/sendtomany.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 """A simple command line tool to create a bunch
 of utxos from one (thus giving more potential commitments
 for a Joinmarket user, although of course it may be useful
diff --git a/scripts/tumbler.py b/scripts/tumbler.py
index dc39b63..0cd882b 100644
--- a/scripts/tumbler.py
+++ b/scripts/tumbler.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 import sys
 from twisted.internet import reactor
diff --git a/scripts/wallet-tool.py b/scripts/wallet-tool.py
index 9cded3a..7817b2c 100644
--- a/scripts/wallet-tool.py
+++ b/scripts/wallet-tool.py
@@ -1,6 +1,3 @@
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 from jmbase import jmprint
 from jmclient import wallet_tool_main
diff --git a/scripts/yg-privacyenhanced.py b/scripts/yg-privacyenhanced.py
index 03631c9..de57cc2 100644
--- a/scripts/yg-privacyenhanced.py
+++ b/scripts/yg-privacyenhanced.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 from future.utils import iteritems
 
 import random
diff --git a/scripts/yield-generator-basic.py b/scripts/yield-generator-basic.py
index 0b76306..2094674 100644
--- a/scripts/yield-generator-basic.py
+++ b/scripts/yield-generator-basic.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 
 from jmbase import jmprint
 from jmclient import YieldGeneratorBasic, ygmain
diff --git a/setupall.py b/setupall.py
index 230455d..b52ec1d 100644
--- a/setupall.py
+++ b/setupall.py
@@ -17,6 +17,9 @@ to libsodium.
 All modes require and install twisted.
 """
 
+if sys.version_info < (3, 3):
+    raise RuntimeError("This package requres Python 3.3+")
+
 def help():
     print("Usage: python setupall.py <mode>\n"
           "Mode is one of:\n"
diff --git a/test/common.py b/test/common.py
index 6dc8fce..971eb79 100644
--- a/test/common.py
+++ b/test/common.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Some helper functions for testing'''
 
 import sys
diff --git a/test/test_segwit.py b/test/test_segwit.py
index 7e9e00e..a222e5f 100644
--- a/test/test_segwit.py
+++ b/test/test_segwit.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Test creation of segwit transactions.'''
 
 import binascii
diff --git a/test/ygrunner.py b/test/ygrunner.py
index 7e68327..c55985f 100644
--- a/test/ygrunner.py
+++ b/test/ygrunner.py
@@ -1,7 +1,4 @@
 #! /usr/bin/env python
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import * # noqa: F401
 '''Creates wallets and yield generators in regtest. 
    Provides seed for joinmarket-qt test.
    This should be run via pytest, even though