This is my patch:

[ 1180995 ] binary formats for marshalling floats

Adds 2 new type codes for marshal (binary floats and binary complexes), a
new marshal version (2), updates MAGIC and fiddles the de-serializing of
code objects to be less likely to clobber the real reason for failing if
it fails.

1 files changed, 15 insertions, 1 deletions

diff --git a/Lib/test/test_marshal.py b/Lib/test/test_marshal.py
index 9901a3c..b66eef5 100644
--- a/Lib/test/test_marshal.py
+++ b/Lib/test/test_marshal.py
@@ -73,20 +73,34 @@ class FloatTestCase(unittest.TestCase):
             n /= 123.4567
 
         f = 0.0
-        s = marshal.dumps(f)
+        s = marshal.dumps(f, 2)
         got = marshal.loads(s)
         self.assertEqual(f, got)
+        # and with version <= 1 (floats marshalled differently then)
+        s = marshal.dumps(f, 1)
+        got = marshal.loads(s) 
+        self.assertEqual(f, got)       
 
         n = sys.maxint * 3.7e-250
         while n < small:
             for expected in (-n, n):
                 f = float(expected)
+                
                 s = marshal.dumps(f)
                 got = marshal.loads(s)
                 self.assertEqual(f, got)
+                
+                s = marshal.dumps(f, 1)
+                got = marshal.loads(s)
+                self.assertEqual(f, got)
+                
                 marshal.dump(f, file(test_support.TESTFN, "wb"))
                 got = marshal.load(file(test_support.TESTFN, "rb"))
                 self.assertEqual(f, got)
+                
+                marshal.dump(f, file(test_support.TESTFN, "wb"), 1)
+                got = marshal.load(file(test_support.TESTFN, "rb"))
+                self.assertEqual(f, got)
             n *= 123.4567
         os.unlink(test_support.TESTFN)