email.quoprimime.body_encode can't handle characters that encodings.quopri_codec can

[rpatterson]

BPO	17495
Nosy	@warsaw, @bitdancer
Superseder	bpo-16948: email.mime.text.MIMEText: QP encoding broken with charset!=ISO-8859-1

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2013-03-20.19:08:50.452>
created_at = <Date 2013-03-20.18:15:36.510>
labels = ['type-bug', 'expert-email']
title = "email.quoprimime.body_encode can't handle characters that encodings.quopri_codec can"
updated_at = <Date 2013-03-20.19:12:55.316>
user = 'https://bugs.python.org/rpatterson'

bugs.python.org fields:

activity = <Date 2013-03-20.19:12:55.316>
actor = 'r.david.murray'
assignee = 'none'
closed = True
closed_date = <Date 2013-03-20.19:08:50.452>
closer = 'rpatterson'
components = ['email']
creation = <Date 2013-03-20.18:15:36.510>
creator = 'rpatterson'
dependencies = []
files = []
hgrepos = []
issue_num = 17495
keywords = []
message_count = 5.0
messages = ['184772', '184774', '184777', '184778', '184779']
nosy_count = 3.0
nosy_names = ['barry', 'r.david.murray', 'rpatterson']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '16948'
type = 'behavior'
url = 'https://bugs.python.org/issue17495'
versions = ['Python 3.3']

[rpatterson]

When using email.charset.Charset to encode MIME bodie as quoted-printable, some characters that are encodable with the quopri_codec cause a KeyError in email.quoprimime:

Python 3.3.0 (default, Oct  7 2012, 14:43:21) 
[GCC 4.6.3] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> text_encoded = b'mo \xe2\x82\xac'
>>> text = text_encoded.decode('utf-8')
>>> print(text)
mo €
>>> import codecs
>>> codecs.getencoder('quopri_codec')(text_encoded)[0]
b'mo=20=E2=82=AC'
>>> from email import charset
>>> c = charset.Charset('utf-8')
>>> c.header_encoding = charset.QP
>>> c.body_encoding = charset.QP
>>> c.header_encode(text)
'=?utf-8?q?mo_=E2=82=AC?='
>>> c.body_encode(text)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.3/email/charset.py", line 395, in body_encode
    return email.quoprimime.body_encode(string)
  File "/usr/lib/python3.3/email/quoprimime.py", line 240, in body_encode
    if body_check(ord(c)):
  File "/usr/lib/python3.3/email/quoprimime.py", line 81, in body_check
    return chr(octet) != _QUOPRI_BODY_MAP[octet]
KeyError: 8364

[rpatterson]

What is the reason that email.quoprimime doesn't use codecs.getencoder('quopri_codec') to do the actual character encoding?

[bitdancer]

There is a long history behind quoprime in the email package, and I don't know all of it. It is on my list of things to sort out (there is also potential duplication with the binascii module), but I haven't gotten to it yet.

The issue you report, though is a duplicate of bpo-16948 and is already fixed in the repo.

You checked off 2.7. Did you actually see a failure in 2.7? It shouldn't be broken there.

[rpatterson]

I thought I had tested it under 2.7, but I'm not entirely sure.

[bitdancer]

OK, if you find it is a bug on 2.7 you can reopen.