Remove unneeded compatibility code

jkseppan · jkseppan · commit f34907796c09 · 2015-07-08T15:39:01.000+03:00
- replace the single use of six.moves.map with a list comprehension
- io.BytesIO is included in all versions of Python we support
- the set type is a builtin in all versions of Python we support
diff --git a/lib/matplotlib/backends/backend_pdf.py b/lib/matplotlib/backends/backend_pdf.py
@@ -8,7 +8,6 @@
                         unicode_literals)
 
 import six
-from six.moves import map
 
 import codecs
 import os
@@ -20,14 +19,10 @@
 
 import numpy as np
 from six import unichr
-from six import BytesIO
+from io import BytesIO
 
 from datetime import datetime
 from math import ceil, cos, floor, pi, sin
-try:
-    set
-except NameError:
-    from sets import Set as set
 
 import matplotlib
 from matplotlib import __version__, rcParams
@@ -592,7 +587,7 @@ def write(self, data):
             self.currentstream.write(data)
 
     def output(self, *data):
-        self.write(fill(list(map(pdfRepr, data))))
+        self.write(fill([pdfRepr(x) for x in data]))
         self.write(b'\n')
 
     def beginStream(self, id, len, extra=None):
