Unicode, stdout, and stderr

Terry Reedy tjreedy at udel.edu
Tue Jul 22 19:38:44 CEST 2014


On 7/22/2014 2:18 AM, Frank Millman wrote:
> Hi all
>
> This is not important, but I would appreciate it if someone could explain
> the following, run from cmd.exe on Windows Server 2003 -
>
> C:\>python
> Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:38:22) [MSC v.1600 32 bit
> (In
> tel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> x = '\u2119'
>>>> x  # this uses stderr
> '\u2119'
>>>> print(x)  # this uses stdout
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "C:\Python34\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 '\u2119' in
> position
> 0: character maps to <undefined

On Windows, at least, the Idle gui generally handles unicode (certainly 
the BMP) much better than the interpreter command prompt interface.

 >>> x = '\u2119'
 >>> x
'ℙ'
 >>> print(x)
ℙ

-- 
Terry Jan Reedy





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