Fix pyparsing on python 3 check

Author: mdboom

lib/matplotlib/__init__.py

@@ -115,7 +115,7 @@
     raise ImportError("matplotlib requires pyparsing")
 else:
     if sys.version_info[0] >= 3:
-        if [int(x) for x in pyparsing.__version__.split('.')] <= (1, 5, 6):
+        if [int(x) for x in pyparsing.__version__.split('.')] <= [1, 5, 6]:
             raise ImportError(
                 "matplotlib requires pyparsing > 1.5.6 on Python 3.x")
 

setupext.py

@@ -836,6 +836,11 @@ def check(self):
                 "support. pip/easy_install may attempt to install it "
                 "after matplotlib.")
 
+        if sys.version_info[0] >= 3:
+            if [int(x) for x in pyparsing.__version__.split('.')] <= [1, 5, 6]:
+                return (
+                    "matplotlib requires pyparsing > 1.5.6 on Python 3.x")
+
         return "using pyparsing version %s" % pyparsing.__version__
 
     def get_install_requires(self):