autoreload does not work in ipython 0.13.x, python 3.3

[2sn]

~/python/source3>ipython3
Python 3.3.0 (default, Sep 29 2012, 22:07:38) 
Type "copyright", "credits" or "license" for more information.

IPython 0.13.2 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: %load_ext autoreload

In [2]: %autoreload 2

In [3]: from multiprocessing import util
[autoreload of importlib._bootstrap failed: Traceback (most recent call last):
  File "/usr/lib/python3.3/site-packages/IPython/extensions/autoreload.py", line 243, in check
    superreload(m, reload, self.old_objects)
AttributeError: 'module' object has no attribute '__loader__'
]

In [4]: from multiprocessing import util

ImportError                               Traceback (most recent call last)
<ipython-input-4-11d3538f481e> in <module>()
----> 1 from multiprocessing import util

ImportError: cannot import name util

...

[takluyver]

importlib._bootstrap is a Python 3.3 thing. I'm not sure why the tests haven't picked it up, though... ah, no, they were disabled in #1911.

I had a feeling there was a blacklist of modules not to try reloading, but I can't see it anywhere in the code. See also #2976 for a similar (but not the same) failure.

[takluyver]

I can't currently replicate this with master in Python 3.3 on Ubuntu. Can you see if it still affects you?

[2sn]

I think it seems now fixed. It seems different in 3.3 than in earlier
versions - the entire import/reload. Thanks! -Alexander

On 30/06/13 07:37, Thomas Kluyver wrote:

I can't currently replicate this with master in Python 3.3 on Ubuntu. Can you see if it still affects you?

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[takluyver]

Yep, the import machinery was reworked in Python 3.3 - there are some details here: http://docs.python.org/3/whatsnew/3.3.html#using-importlib-as-the-implementation-of-import

Anyway, closing this now as it seems to be fixed, we can reopen it if the bug reappears.

[2sn]

Dear Thomas,

OK, Thanks!

-Alexander

On 01/07/13 22:40, Thomas Kluyver wrote:

Yep, the import machinery was reworked in Python 3.3 - there are some details here: http://docs.python.org/3/whatsnew/3.3.html#using-importlib-as-the-implementation-of-import

Anyway, closing this now as it seems to be fixed, we can reopen it if the bug reappears.

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[2sn]

... but it actually still does not work. %autorelaod seems to be just
ignored. I would classify this as 'fail'.

On 01/07/13 22:40, Thomas Kluyver wrote:

Yep, the import machinery was reworked in Python 3.3 - there are some details here: http://docs.python.org/3/whatsnew/3.3.html#using-importlib-as-the-implementation-of-import

Anyway, closing this now as it seems to be fixed, we can reopen it if the bug reappears.

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[Carreau]

@2sn did you try on master?