diff -r 0ebc9005cb00 Lib/getpass.py
--- a/Lib/getpass.py	Thu May 30 21:08:49 2013 -0400
+++ b/Lib/getpass.py	Sun Jun 02 16:07:05 2013 +0800
@@ -16,6 +16,7 @@
 #          Gregory P. Smith (tty support & GetPassWarning)
 
 import os, sys, warnings
+import io
 
 __all__ = ["getpass","getuser","GetPassWarning"]
 
@@ -44,7 +45,7 @@
     try:
         # Always try reading and writing directly on the tty first.
         fd = os.open('/dev/tty', os.O_RDWR|os.O_NOCTTY)
-        tty = os.fdopen(fd, 'w+', 1)
+        tty = os.fdopen(fd, 'wb+', buffering=0)
         input = tty
         if not stream:
             stream = tty
@@ -83,7 +84,11 @@
             del input, tty  # clean up unused file objects before blocking
             passwd = fallback_getpass(prompt, stream)
 
-    stream.write('\n')
+    if type(stream)==io.FileIO:
+        stream.write(bytes('\n', 'UTF-8'))
+        stream.close()
+    else:
+        stream.write('\n')
     return passwd
 
 
@@ -127,7 +132,10 @@
         input = sys.stdin
     prompt = str(prompt)
     if prompt:
-        stream.write(prompt)
+        if type(stream)==io.FileIO:
+            stream.write(bytes(prompt, 'UTF-8'))
+        else:
+            stream.write(prompt)
         stream.flush()
     # NOTE: The Python C API calls flockfile() (and unlock) during readline.
     line = input.readline()