Serhiy Storchaka added the comment:
> However, the two intro paragraphs need a bit of work.
Yes, it's a help which I needed. Thank you.
However your wording is not entirely correct. In 2.7 binary-to-binary codecs
and rot-13 works with Unicode strings (only ascii-compatible) as with bytes
strings.
>>> u'Python'.encode('base64')
'UHl0aG9u\n'
>>> u'UHl0aG9u'.decode('base64')
'Python'
>>> u'Python\u20ac'.encode('base64')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/serhiy/py/cpython-2.7/Lib/encodings/base64_codec.py", line 24, in
base64_encode
output = base64.encodestring(input)
File "/home/serhiy/py/cpython-2.7/Lib/base64.py", line 315, in encodestring
pieces.append(binascii.b2a_base64(chunk))
UnicodeEncodeError: 'ascii' codec can't encode character u'\u20ac' in position
6: ordinal not in range(128)
Rot-13 works as common text-to-binary encoding (encode returns str, decode
returns unicode).
>>> u'Python'.encode('rot13')
'Clguba'
>>> u'Python'.decode('rot13')
u'Clguba'
>>> 'Python'.encode('rot13')
'Clguba'
>>> 'Python'.decode('rot13')
u'Clguba'
>>> u'Python\u20ac'.encode('rot13')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/serhiy/py/cpython-2.7/Lib/encodings/rot_13.py", line 17, in encode
return codecs.charmap_encode(input,errors,encoding_map)
UnicodeEncodeError: 'charmap' codec can't encode character u'\u20ac' in
position 6: character maps to <undefined>
>>> u'Python\u20ac'.decode('rot13')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/serhiy/py/cpython-2.7/Lib/encodings/rot_13.py", line 20, in decode
return codecs.charmap_decode(input,errors,decoding_map)
UnicodeEncodeError: 'ascii' codec can't encode character u'\u20ac' in position
6: ordinal not in range(128)
----------
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<http://bugs.python.org/issue17844>
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