diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a620989
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+*.pyc
+build/
+test/*.out
+test/*.tstout
diff --git a/Milter/__init__.py b/Milter/__init__.py
index 7992b9e..8946a49 100755
--- a/Milter/__init__.py
+++ b/Milter/__init__.py
@@ -9,7 +9,7 @@
 # This code is under the GNU General Public License.  See COPYING for details.
 
 from __future__ import print_function
-__version__ = '0.9.8'
+__version__ = '1.0.1'
 
 import os
 import re
diff --git a/Milter/pyip6.py b/Milter/pyip6.py
index 3921413..ea62496 100644
--- a/Milter/pyip6.py
+++ b/Milter/pyip6.py
@@ -81,7 +81,7 @@ def inet_pton(p):
   (0, 0, 0, 0, 0, 65535, 258, 772)
 
   >>> try: inet_pton('::1.2.3.4.5')
-  ... except ValueError,x: print(x)
+  ... except ValueError as x: print(x)
   ::1.2.3.4.5
   """
   if p == '::':
@@ -115,4 +115,4 @@ def inet_pton(p):
         return struct.pack('!HHHHHHHH',
 	    *[int(s,16) for s in a[0].split(':')])
   except ValueError: pass
-  raise ValueError,p
+  raise ValueError(p)
diff --git a/testutils.py b/testutils.py
index c120ca1..23cafbe 100644
--- a/testutils.py
+++ b/testutils.py
@@ -5,6 +5,7 @@ import os
 import Milter.utils
 from Milter.cache import AddrCache
 from Milter.dynip import is_dynip
+from Milter.pyip6 import inet_ntop
 
 class AddrCacheTestCase(unittest.TestCase):
 
@@ -48,6 +49,7 @@ def suite():
   s = unittest.makeSuite(AddrCacheTestCase,'test')
   s.addTest(doctest.DocTestSuite(Milter.utils))
   s.addTest(doctest.DocTestSuite(Milter.dynip))
+  s.addTest(doctest.DocTestSuite(Milter.pyip6))
   return s
 
 if __name__ == '__main__':