diff --git a/gui/stdio.py b/gui/stdio.py
index f08d4e27..e3a39614 100644
--- a/gui/stdio.py
+++ b/gui/stdio.py
@@ -1,9 +1,3 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
-import six
 from decimal import Decimal
 _ = lambda x:x
 #from i18n import _
diff --git a/gui/text.py b/gui/text.py
index 2e613066..f9f2f524 100644
--- a/gui/text.py
+++ b/gui/text.py
@@ -1,9 +1,3 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
-import six
 import tty, sys
 import curses, datetime, locale
 from decimal import Decimal
diff --git a/lib/coinchooser.py b/lib/coinchooser.py
index 464a8887..5d7509e8 100644
--- a/lib/coinchooser.py
+++ b/lib/coinchooser.py
@@ -22,11 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 from collections import defaultdict, namedtuple
 from math import floor, log10
 
diff --git a/lib/commands.py b/lib/commands.py
index b377dee3..6201e1ab 100644
--- a/lib/commands.py
+++ b/lib/commands.py
@@ -22,10 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 import os
 import sys
diff --git a/lib/contacts.py b/lib/contacts.py
index e3bc2189..ee1fa861 100644
--- a/lib/contacts.py
+++ b/lib/contacts.py
@@ -20,12 +20,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
-
 import sys
 import re
 import dns
diff --git a/lib/daemon.py b/lib/daemon.py
index fbc9c28f..f6b8bca9 100644
--- a/lib/daemon.py
+++ b/lib/daemon.py
@@ -22,11 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import ast
 import os
 import sys
diff --git a/lib/dnssec.py b/lib/dnssec.py
index 4fc62345..f747a4f0 100644
--- a/lib/dnssec.py
+++ b/lib/dnssec.py
@@ -22,12 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
-
 
 # Check DNSSEC trust chain.
 # Todo: verify expiration dates
diff --git a/lib/exchange_rate.py b/lib/exchange_rate.py
index 3f1cce53..95b60d9f 100644
--- a/lib/exchange_rate.py
+++ b/lib/exchange_rate.py
@@ -1,8 +1,3 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 from datetime import datetime
 import inspect
 import requests
diff --git a/lib/i18n.py b/lib/i18n.py
index fe7b1988..49adf87c 100644
--- a/lib/i18n.py
+++ b/lib/i18n.py
@@ -22,11 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import gettext, os
 
 LOCALE_DIR = os.path.join(os.path.dirname(__file__), 'locale')
diff --git a/lib/interface.py b/lib/interface.py
index ef4fcfcd..b9e6e42b 100644
--- a/lib/interface.py
+++ b/lib/interface.py
@@ -22,11 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import os
 import re
 import socket
diff --git a/lib/mnemonic.py b/lib/mnemonic.py
index 0c9b2331..bcef386c 100644
--- a/lib/mnemonic.py
+++ b/lib/mnemonic.py
@@ -22,12 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
-
 import os
 import hmac
 import math
diff --git a/lib/msqr.py b/lib/msqr.py
index 223bba39..76629fc6 100644
--- a/lib/msqr.py
+++ b/lib/msqr.py
@@ -1,8 +1,3 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 # from http://eli.thegreenplace.net/2009/03/07/computing-modular-square-roots-in-python/
 
 def modular_sqrt(a, p):
diff --git a/lib/network.py b/lib/network.py
index 9e741b7c..49b4d1c6 100644
--- a/lib/network.py
+++ b/lib/network.py
@@ -21,11 +21,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import time
 import queue
 import os
diff --git a/lib/old_mnemonic.py b/lib/old_mnemonic.py
index b63cc0f3..7af66995 100644
--- a/lib/old_mnemonic.py
+++ b/lib/old_mnemonic.py
@@ -22,10 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 
 # list of words from http://en.wiktionary.org/wiki/Wiktionary:Frequency_lists/Contemporary_poetry
diff --git a/lib/paymentrequest.py b/lib/paymentrequest.py
index aea9cb7e..3fa2ca40 100644
--- a/lib/paymentrequest.py
+++ b/lib/paymentrequest.py
@@ -22,11 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import hashlib
 import os.path
 import re
diff --git a/lib/pem.py b/lib/pem.py
index a64ab919..06b23df0 100644
--- a/lib/pem.py
+++ b/lib/pem.py
@@ -22,10 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 
 # This module uses code from TLSLlite
diff --git a/lib/rsakey.py b/lib/rsakey.py
index 0a119e5d..932c79cd 100644
--- a/lib/rsakey.py
+++ b/lib/rsakey.py
@@ -33,11 +33,6 @@
 
 """Pure-Python RSA implementation."""
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import os
 import math
 import base64
diff --git a/lib/simple_config.py b/lib/simple_config.py
index e1db4b2a..59d733ec 100644
--- a/lib/simple_config.py
+++ b/lib/simple_config.py
@@ -1,8 +1,3 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import ast
 import json
 import threading
diff --git a/lib/synchronizer.py b/lib/synchronizer.py
index eccc0f50..8ddbd3e0 100644
--- a/lib/synchronizer.py
+++ b/lib/synchronizer.py
@@ -22,11 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 from threading import Lock
 import hashlib
 
diff --git a/lib/util.py b/lib/util.py
index 9c46ff4e..5ab71846 100644
--- a/lib/util.py
+++ b/lib/util.py
@@ -20,11 +20,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import binascii
 import os, sys, re, json
 from collections import defaultdict
diff --git a/lib/websockets.py b/lib/websockets.py
index 3cc7463e..b670714a 100644
--- a/lib/websockets.py
+++ b/lib/websockets.py
@@ -22,11 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import queue
 import threading, os, json, time
 from collections import defaultdict
diff --git a/lib/x509.py b/lib/x509.py
index 72ffdfab..313982bd 100644
--- a/lib/x509.py
+++ b/lib/x509.py
@@ -22,11 +22,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 from datetime import datetime
 import sys
 from . import util