(I)Python consoles are not setting PyQt API to #2

[ronanpaixao]

When using a console, either just Python or IPython consoles, it's not possible to set PyQt's APIs to v2 (important when using Python 2.7-) because sip complains PyQt's API was already set.

What steps will reproduce the problem?

1. Open a console
2. Paste this code:

import sip
sip.setapi("QString", 2)

What is the expected output? What do you see instead?

I expected the API to be set smoothly, without problems. Since each console is a new process, this shouldn't be a problem. However, one can only set the API before importing anything from PyQt, otherwise a ValueError is raised:

Traceback (most recent call last):

  File "<ipython-input-1-d148d852a0a4>", line 2, in <module>
    sip.setapi("QString", 2)

ValueError: API 'QString' has already been set to version 1

Please provide any additional information below

First I noticed that sip.getapi("QString") would return 1 in a console. However, if running it in the Internal console, I get a 2.

I've also had some binary-search "fun" with git and tracked the regression to Steven Silvester's branch, on commit
c701aa6 - Fix circular import

The previous commit:
cba88eb - Fix required version adding
did not pose the same problem.

The branch was merged in commit
b60139e - Merge pull request #2932 from blink1073/async-introspection - PR: Asynchronous introspection for the Editor

Versions and main components

• Spyder Version: 3.0.0dev
• Python Version: Python 2.7.11 |Anaconda 2.5.0 (64-bit)| (default, Jan 29 2016, 14:26:21) [MSC v.1500 64 bit (AMD64)] on win32
• Operating system: Windows 8.1 64-bit

Dependencies

Please go to the menu entry Help > Optional Dependencies (or
Help > Dependencies), press the button Copy to clipboard
and paste the contents below:
jedi >=0.8.1 : 0.9.0 (OK)
matplotlib >=1.0: 1.5.1 (OK)
nbconvert >=4.0 : 4.1.0 (OK)
numpy >=1.7 : 1.10.4 (OK)
pandas >=0.13.1 : 0.17.1 (OK)
pep8 >=0.6 : 1.7.0 (OK)
pyflakes >=0.5.0: 1.0.0 (OK)
pygments >=1.6 : 2.1 (OK)
pylint >=0.25 : 1.5.4 (OK)
qtconsole >=4.0 : 4.1.1 (OK)
rope >=0.9.4 : 0.9.4 (OK)
sphinx >=0.6.6 : 1.3.5 (OK)
sympy >=0.7.3 : 0.7.7.dev (OK)