TypeError using tarfile.addfile() with io.StringIO replacing StringIO.StringIO()

[FirstnameLastname]

BPO	17929
Nosy	@bitdancer
Files	showbug.py: demonstration

^{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 2013-05-07.20:07:35.050>
created_at = <Date 2013-05-07.19:18:21.407>
labels = ['invalid', 'type-bug', 'library']
title = 'TypeError using tarfile.addfile() with io.StringIO replacing StringIO.StringIO()'
updated_at = <Date 2013-05-07.20:11:15.709>
user = 'https://bugs.python.org/FirstnameLastname'

bugs.python.org fields:

activity = <Date 2013-05-07.20:11:15.709>
actor = 'r.david.murray'
assignee = 'none'
closed = True
closed_date = <Date 2013-05-07.20:07:35.050>
closer = 'r.david.murray'
components = ['Library (Lib)']
creation = <Date 2013-05-07.19:18:21.407>
creator = 'Firstname.Lastname'
dependencies = []
files = ['30169']
hgrepos = []
issue_num = 17929
keywords = []
message_count = 3.0
messages = ['188682', '188684', '188685']
nosy_count = 2.0
nosy_names = ['r.david.murray', 'Firstname.Lastname']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue17929'
versions = ['Python 3.3']

[FirstnameLastname]

Trying to work with tarfile library and python 3.3 (Ubuntu 13.04 64-bit)

While everything works quite well using StringIO.StringIO() and python 2.7.4, the equivalent code with io.StringIO() and python 3.3.1 doesn't. Is that a bug or am I doing something wrong ?

[bitdancer]

Basic questions like this aren't really suitable for the tracker, you should use other forums such as the python-list mailing list or the #python irc channel.

In Python3, bytes and strings are different classes, but in Python2 they are not. You need to be working with BytesIO.

[bitdancer]

Bah, I should reread my messages *before* I hit submit. A better phrasing would be "questions like this aren't what the tracker is intended to answer, you will get more and better help from..." :)

(The bytes/string split is the most important thing to understand about python3 vs python2.)