qtconsole ipython 0.13.2 - html/xhtml export fails

[kfiz]

Hi,
I'm having problems trying to export qtconsole sessions to html/xhtml on my linux box(Macbook Pro). I'm running python 3.3.2.
The html export fails with:

'Traceback (most recent call last):
  File "/usr/lib/python3.3/site-packages/IPython/frontend/qt/console/rich_ipython_widget.py", line 71, in export_html
    super(RichIPythonWidget, self).export_html()
  File "/usr/lib/python3.3/site-packages/IPython/frontend/qt/console/console_widget.py", line 615, in export_html
    self._html_exporter.export()
  File "/usr/lib/python3.3/site-packages/IPython/frontend/qt/rich_text.py", line 80, in export
    if inline is None and IMG_RE.search(html):
TypeError: can't use a string pattern on a bytes-like object'

The xhtml export fails with :
'Type string doesn't support the buffer API'
Am I doing something wrong?

Cheers

[minrk]

Probably a unicode-handling bug in our code that only affects Python 3.

[stonebig]

Isn't it an issue that #4043 may suddenly solve ?
(4 common keywords : "png" + (unexpected "bytes-like") + "py3k" + "to html")

[Carreau]

nop. Qtconsole has nothing to do with ipynb files.

[stonebig]

Hello,

On my windows pc
Trying with http://matplotlib.org/examples/lines_bars_and_markers/line_demo_dash_control.html

With Python 2.7 / ipython 0.13.2 or ipython 1.0.0rc1, everything works (inlining or not inlining the png).

With Python 3.3 / ipython 1.0.0 (patched with 4043), it asks me where to save the .html, then the "inline / external" question doesn't show up, then I get in the dos windows the same message
\IPython\qt\rich_text.py", line 80, in export
if inline is None and IMG_RE.search(html):
TypeError: can't use a string pattern on a bytes-like object

remark

---

Trying to digg further , I found a reference to a remark from GaelVaroquaux
"# in python3, StringIO does not accept binary data"
(joblib/joblib@e53cc2b)

*** privileged python 2 users behavior below ****

[stonebig]

I don't know if it can help a competent "doctor", but If I spy the "image_tag" coming to ensure_utf8(image_tag)
I see, with print(image_tag.class)

• gives a "type 'instancemethod'" for python 2.7
• gives a "class 'method'" for python 3.3

[minrk]

It's a fairly straightforward bug: when saving to HTML, we explicitly encode to utf8 bytes, rather than leaving as unicode, which is pretty clearly inappropriate. PR #4054 should address the issue, though I don't have access to a Python 3 environment with working Qt, so it needs some help testing.

[stonebig]

Hello MinRK,

I confirm that, under windows32 bit, python3.3, ipython2.0.0dev, it solves the issue

• export with "png" inline works great,
• export with "png" external works as great.
  ==> Another Hourra for minRK ... \o/ ...\o/ ... \o/ ... !

Looking further, there is an option ".xhtml" just below the ".html" one.

If I try it now out of the box

• it doesn't fail either, like it was yesterday,
• but it asks me an obscure message
  "cannot convert png to svg. to fix this add c.InlineBackend.Configure.figure_format = 'svg' "

The message is much less limpid than the option to launch it, which is 'odd' for a newcomer.
But isn't XHTML just 'dead' ? http://en.wikipedia.org/wiki/Extensible_HyperText_Markup_Language

[minrk]

It's a bit silly to call it 'xhtml', the main thing is that it is HTML with inline SVG, and you can only do that if your figures are SVGs. If you add that config %config InlineBackend.figure_format = 'svg' before making plots, the SVG export should work.

[stonebig]

ok,

I type that in my qt console
It then default to "xhtml" backup
But then it sends me the "cannot convert png to svg. to fix this add c.InlineBackend.Configure.figure_format = 'svg' " message again.
same after a relaunch of kernel. (but maybe it's my winpython installation problem)
(ok solved , the config must be done before doing matplotlib figures)

[minrk]

Hm, I will have to test with Python 3 to make sure there isn't another issue to fix (there may well be).

[stonebig]

I didn't try 'xhtml' in python2 either ... let see
(stupid me : i must change the configuration before doing the graphic, I guess)

• It sort of blows up under ipython 0.13 / python 2.7 'ascii codec can't encode characters in position 9988-9990'
  • back to ipython 2.0 dev / Python 3 doing %config InlineBackend.figure_format = 'svg' BEFORE doing the matplotlib action, it works

[kfiz]

I'm not at my box at the moment. I'll check in a few hours.

[kfiz]

Works like a charm. Tried out the xhtml/inline export. Thanks!