ikiwiki/doc/bugs/autosetup_python_warnings.mdwn

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## What I did
A friend reported this, and I'm seeing it too. With 3.20140916, on
a system with Python 2.7 and 3.4 (and little else) installed, I
tried to run the auto.setup:
:; ikiwiki --setup /etc/pkg/ikiwiki/auto.setup
What will the wiki be named? Import Errors
What revision control system to use? git
Which user (wiki account or openid) will be admin? schmonz
Setting up Import Errors ...
Importing /Users/schmonz/ImportErrors into git
Initialized empty shared Git repository in /Users/schmonz/ImportErrors.git/
Initialized empty Git repository in /Users/schmonz/ImportErrors/.git/
[master (root-commit) 20b1128] initial commit
1 file changed, 1 insertion(+)
create mode 100644 .gitignore
Counting objects: 3, done.
Writing objects: 100% (3/3), 230 bytes | 0 bytes/s, done.
Total 3 (delta 0), reused 0 (delta 0)
To /Users/schmonz/ImportErrors.git
* [new branch] master -> master
Directory /Users/schmonz/ImportErrors is now a clone of git repository /Users/schmonz/ImportErrors.git
Traceback (most recent call last):
File "/usr/pkg/lib/ikiwiki/plugins/rst", line 45, in <module>
from proxy import IkiWikiProcedureProxy
File "/usr/pkg/lib/ikiwiki/plugins/proxy.py", line 41, in <module>
import xml.parsers.expat
File "/usr/pkg/lib/python3.4/xml/parsers/expat.py", line 4, in <module>
from pyexpat import *
ImportError: No module named 'pyexpat'
Creating wiki admin schmonz ...
Choose a password:
[...]
## What I expected
I expected to get a basic site.
## What happened instead
I got a basic site with some Python error messages.
## Likely fix
Looks like `proxy.py` needs the trick from [[!debbug 637604]] so
that it can defer a few imports (at least `xml.parsers.expat` and
the XML-RPC libs) until the methods using them are called. --[[schmonz]]