matplotlib · timhoffm · Feb 28, 2018 · Feb 28, 2018
diff --git a/lib/matplotlib/backends/_gtk3_compat.py b/lib/matplotlib/backends/_gtk3_compat.py
@@ -11,11 +11,6 @@
 Thus, to force usage of PGI when both bindings are installed, import it first.
 """
 
-from __future__ import (absolute_import, division, print_function,
-                        unicode_literals)
-
-import six
-
 import importlib
 import sys
 

diff --git a/lib/matplotlib/backends/backend_gtk3agg.py b/lib/matplotlib/backends/backend_gtk3agg.py
@@ -1,8 +1,3 @@
-from __future__ import (absolute_import, division, print_function,
-                        unicode_literals)
-
-import six
-
 import numpy as np
 import warnings
 
@@ -11,7 +6,7 @@
 from .backend_gtk3 import _BackendGTK3
 from matplotlib import transforms
 
-if six.PY3 and not HAS_CAIRO_CFFI:
+if not HAS_CAIRO_CFFI:
     warnings.warn(
         "The Gtk3Agg backend is known to not work on Python 3.x with pycairo. "
         "Try installing cairocffi.")

diff --git a/lib/matplotlib/backends/backend_gtk3cairo.py b/lib/matplotlib/backends/backend_gtk3cairo.py
@@ -1,8 +1,3 @@
-from __future__ import (absolute_import, division, print_function,
-                        unicode_literals)
-
-import six
-
 from . import backend_cairo, backend_gtk3
 from .backend_cairo import cairo, HAS_CAIRO_CFFI
 from .backend_gtk3 import _BackendGTK3

diff --git a/lib/matplotlib/backends/backend_qt4.py b/lib/matplotlib/backends/backend_qt4.py
@@ -1,8 +1,3 @@
-from __future__ import (absolute_import, division, print_function,
-                        unicode_literals)
-
-import six
-
 from .backend_qt5 import (
     backend_version, SPECIAL_KEYS, SUPER, ALT, CTRL, SHIFT, MODIFIER_KEYS,
     cursord, _create_qApp, _BackendQT5, TimerQT, MainWindow, FigureManagerQT,

diff --git a/lib/matplotlib/backends/backend_qt4agg.py b/lib/matplotlib/backends/backend_qt4agg.py
@@ -1,10 +1,6 @@
 """
 Render to qt from agg
 """
-from __future__ import (absolute_import, division, print_function,
-                        unicode_literals)
-
-import six
 
 from .backend_qt5agg import (
     _BackendQT5Agg, FigureCanvasQTAgg, FigureManagerQT, NavigationToolbar2QT)

diff --git a/lib/matplotlib/backends/backend_qt5agg.py b/lib/matplotlib/backends/backend_qt5agg.py
@@ -1,10 +1,6 @@
 """
 Render to qt from agg
 """
-from __future__ import (absolute_import, division, print_function,
-                        unicode_literals)
-
-import six
 
 import ctypes
 
@@ -63,7 +59,7 @@ def paintEvent(self, e):
             qimage = QtGui.QImage(buf, w, h, QtGui.QImage.Format_ARGB32)
             # Adjust the buf reference count to work around a memory leak bug
             # in QImage under PySide on Python 3.
-            if QT_API == 'PySide' and six.PY3:
+            if QT_API == 'PySide':
                 ctypes.c_long.from_address(id(buf)).value = 1
             if hasattr(qimage, 'setDevicePixelRatio'):
                 # Not available on Qt4 or some older Qt5.

diff --git a/lib/matplotlib/backends/backend_qt5cairo.py b/lib/matplotlib/backends/backend_qt5cairo.py
@@ -1,5 +1,4 @@
-
-import six
+import ctypes
 
 from .backend_cairo import cairo, FigureCanvasCairo, RendererCairo
 from .backend_qt5 import QtCore, QtGui, _BackendQT5, FigureCanvasQT
@@ -32,8 +31,7 @@ def paintEvent(self, event):
                               QtGui.QImage.Format_ARGB32_Premultiplied)
         # Adjust the buf reference count to work around a memory leak bug in
         # QImage under PySide on Python 3.
-        if QT_API == 'PySide' and six.PY3:
-            import ctypes
+        if QT_API == 'PySide':
             ctypes.c_long.from_address(id(buf)).value = 1
         if hasattr(qimage, 'setDevicePixelRatio'):
             # Not available on Qt4 or some older Qt5.

diff --git a/lib/matplotlib/backends/backend_tkagg.py b/lib/matplotlib/backends/backend_tkagg.py
@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 from .. import cbook
 from . import tkagg  # Paint image to Tk photo blitter extension.
 from .backend_agg import FigureCanvasAgg

diff --git a/lib/matplotlib/backends/backend_tkcairo.py b/lib/matplotlib/backends/backend_tkcairo.py
@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import sys
 
 import numpy as np

diff --git a/lib/matplotlib/backends/backend_wxcairo.py b/lib/matplotlib/backends/backend_wxcairo.py
@@ -1,8 +1,3 @@
-from __future__ import (absolute_import, division, print_function,
-                        unicode_literals)
-
-import six
-
 import wx
 
 from .backend_cairo import cairo, FigureCanvasCairo, RendererCairo

diff --git a/lib/matplotlib/pylab.py b/lib/matplotlib/pylab.py
@@ -212,12 +212,6 @@
 
 
 """
-from __future__ import (absolute_import, division, print_function,
-                        unicode_literals)
-
-import six
-
-import warnings
 
 from matplotlib.cbook import (
     flatten, exception_to_str, silent_list, iterable, dedent)
@@ -265,4 +259,4 @@
 
 # This is needed, or bytes will be numpy.random.bytes from
 # "from numpy.random import *" above
-bytes = six.moves.builtins.bytes
+bytes = __import__("builtins").bytes