Patch:
--------------------------------
import sys
import builtins

def hook(message):
    if message is None:
        return
    builtins._ = message
    try:
        print(repr(message))
    except UnicodeEncodeError:
        print(ascii(message))

sys.displayhook = hook
--------------------------------

# This file shows the behavior of Py2.x on Windows (non-UTF8 terminal) and
# Linux (UTF8 terminal), the "unexpected" errors raised by Py3 on Windows
# and how the patch can fix them, and finally shows that the patch doesn't
# affect the behavior on a UTF8 terminal.


# Python 2.6, Windows, non-UTF8 terminal
Python 2.6 (r26:66721, Oct  2 2008, 11:35:03) [MSC v.1500 32 bit (Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> u'\ud800'
u'\ud800'
>>> print u'\ud800'
UnicodeEncodeError: 'charmap' codec can't encode character u'\ud800' in position
 0: character maps to <undefined>
>>> u'\u2620'
u'\u2620'
>>> print u'\u2620'
UnicodeEncodeError: 'charmap' codec can't encode character u'\u2620' in position
 0: character maps to <undefined>
>>> [u'àáâãäåæ', u'ÀÁÂÃÄÅÆ']
[u'\xe0\xe1\xe2\xe3\xe4\xe5\xe6', u'\xc0\xc1\xc2\xc3\xc4\xc5\xc6']
>>> print [u'àáâãäåæ', u'ÀÁÂÃÄÅÆ']
[u'\xe0\xe1\xe2\xe3\xe4\xe5\xe6', u'\xc0\xc1\xc2\xc3\xc4\xc5\xc6']
>>> [u'\u30aa\u30ab', u'\u30b1\u30b2']
[u'\u30aa\u30ab', u'\u30b1\u30b2']


# Python 2.5, Linux, UTF8 terminal
Python 2.5.2 (r252:60911, Jul 31 2008, 17:28:52)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> u'\ud800'
u'\ud800'
>>> print u'\ud800'
�
>>> u'\u2620'
u'\u2620'
>>> print u'\u2620'
☠
>>> [u'àáâãäåæ', u'ÀÁÂÃÄÅÆ']
[u'\xe0\xe1\xe2\xe3\xe4\xe5\xe6', u'\xc0\xc1\xc2\xc3\xc4\xc5\xc6']
>>> print [u'àáâãäåæ', u'ÀÁÂÃÄÅÆ']
[u'\xe0\xe1\xe2\xe3\xe4\xe5\xe6', u'\xc0\xc1\xc2\xc3\xc4\xc5\xc6']
>>> [u'\u30aa\u30ab', u'\u30b1\u30b2']
[u'\u30aa\u30ab', u'\u30b1\u30b2']


# Python 3.0, Windows, non-UTF8 terminal
Python 3.0 (r30:67507, Dec  3 2008, 20:14:27) [MSC v.1500 32 bit (Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> '\ud800'
'\ud800'
>>> print('\ud800')
UnicodeEncodeError: 'charmap' codec can't encode character '\ud800' in position
0: character maps to <undefined>
>>> '\u2620' # this should print '\u2620', instead it raises an error
UnicodeEncodeError: 'charmap' codec can't encode character '\u2620' in position
1: character maps to <undefined>
>>> print('\u2620') # this correctly raises an error
UnicodeEncodeError: 'charmap' codec can't encode character '\u2620' in position
0: character maps to <undefined>
>>> ['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> print(['àáâãäåæ', 'ÀÁÂÃÄÅÆ'])
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> ['\xe0\xe1\xe2\xe3\xe4\xe5\xe6', '\xc0\xc1\xc2\xc3\xc4\xc5\xc6']
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> ['\u30aa\u30ab', '\u30b1\u30b2'] # this shouldn't raise an error
UnicodeEncodeError: 'charmap' codec can't encode characters in position 2-3: cha
racter maps to <undefined>


# Python 3.0, Windows, non-UTF8 terminal, patched
Python 3.0 (r30:67507, Dec  3 2008, 20:14:27) [MSC v.1500 32 bit (Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> import builtins
>>>
>>> def hook(message):
...     if message is None:
...         return
...     builtins._ = message
...     try:
...         print(repr(message))
...     except UnicodeEncodeError:
...         print(ascii(message))
...
>>> sys.displayhook = hook
>>> '\ud800'
'\ud800'
>>> print('\ud800')
UnicodeEncodeError: 'charmap' codec can't encode character '\ud800' in position
0: character maps to <undefined>
>>> '\u2620'
'\u2620'
>>> print('\u2620')
UnicodeEncodeError: 'charmap' codec can't encode character '\u2620' in position
0: character maps to <undefined>
>>> ['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> print(['àáâãäåæ', 'ÀÁÂÃÄÅÆ'])
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> ['\xe0\xe1\xe2\xe3\xe4\xe5\xe6', '\xc0\xc1\xc2\xc3\xc4\xc5\xc6']
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> ['\u30aa\u30ab', '\u30b1\u30b2']
['\u30aa\u30ab', '\u30b1\u30b2']
>>> print(['\u30aa\u30ab', '\u30b1\u30b2'])
UnicodeEncodeError: 'charmap' codec can't encode characters in position 2-3: cha
racter maps to <undefined>


# Python 3.0, Linux, UTF8 terminal
Python 3.0 (r30:67503, Jan 31 2009, 03:49:04)
[GCC 4.2.4 (Ubuntu 4.2.4-1ubuntu3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> '\ud800'
'\ud800'
>>> print('\ud800')
�
>>> '\u2620'
'☠'
>>> print('\u2620')
☠
>>> ['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> ['\xe0\xe1\xe2\xe3\xe4\xe5\xe6', '\xc0\xc1\xc2\xc3\xc4\xc5\xc6']
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> ['\u30aa\u30ab', '\u30b1\u30b2']
['オカ', 'ケゲ']
>>> print(['\u30aa\u30ab', '\u30b1\u30b2'])
['オカ', 'ケゲ']



# Python 3.0, Linux, UTF8 terminal, patched
Python 3.0 (r30:67503, Jan 31 2009, 03:49:04)
[GCC 4.2.4 (Ubuntu 4.2.4-1ubuntu3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> import builtins
>>>
>>> def hook(message):
...     if message is None:
...         return
...     builtins._ = message
...     try:
...         print(repr(message))
...     except UnicodeEncodeError:
...         print(ascii(message))
...
>>> sys.displayhook = hook
>>> '\ud800'
'\ud800'
>>> print('\ud800')
�
>>> '\u2620'
'☠'
>>> print('\u2620')
☠
>>> ['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> print(['àáâãäåæ', 'ÀÁÂÃÄÅÆ'])
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> ['\xe0\xe1\xe2\xe3\xe4\xe5\xe6', '\xc0\xc1\xc2\xc3\xc4\xc5\xc6']
['àáâãäåæ', 'ÀÁÂÃÄÅÆ']
>>> ['\u30aa\u30ab', '\u30b1\u30b2']
['オカ', 'ケゲ']
>>> print(['\u30aa\u30ab', '\u30b1\u30b2'])
['オカ', 'ケゲ']