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To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Problem with Unicode char in Python 3.3.0
Date: Mon, 07 Jan 2013 08:12:57 -0500
References: <nobody-672426.17430906012013@news.free.fr> <mailman.175.1357492817.2939.python-list@python.org> <nobody-940F87.13572507012013@news.free.fr>
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On 1/7/2013 7:57 AM, Franck Ditter wrote:

> <<< print('\U0001d11e')
> Traceback (most recent call last):
>    File "<pyshell#1>", line 1, in <module>
>      print('\U0001d11e')
> UnicodeEncodeError: 'UCS-2' codec can't encode character '\U0001d11e'
> in position 0: Non-BMP character not supported in Tk

The message comes from printing to a tk text widget (the IDLE shell), 
not from creating the 1 char string. c = '\U0001d11e' works fine. When 
you have problems with creating and printing unicode, *separate* 
creating from printing to see where the problem is. (I do not know if 
the brand new tcl/tk 8.6 is any better.)

The windows console also chokes, but with a different message.

 >>> c='\U0001d11e'
 >>> print(c)
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "C:\Programs\Python33\lib\encodings\cp437.py", line 19, in encode
     return codecs.charmap_encode(input,self.errors,encoding_map)[0]
UnicodeEncodeError: 'charmap' codec can't encode character '\U0001d11e' 
in posit
ion 0: character maps to <undefined>

Yes, this is very annoying, especially in Win 7.

-- 
Terry Jan Reedy