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Showing content from https://github.com/ipython/ipython/issues/1628/ below:

QApplication already exists in TestKillRing · Issue #1628 · ipython/ipython · GitHub

I'm seeing:

$> iptest -vx IPython.frontend.qt.console.tests
Are backspace characters processed correctly? ... ok
Are beep characters processed correctly? ... ok
Are carriage return characters processed correctly? ... ok
transform CRLF to LF ... ok
Do control sequences for clearing the console work? ... ok
Do basic controls sequences for colors work? ... ok
Do xterm-specific control sequences for colors work? ... ok
Are CR and BS characters processed correctly in combination? ... ok
Are formfeed characters processed correctly? ... ok
Do control sequences for scrolling the buffer work? ... ok
Does the CompletionLexer work for C/C++? ... ok
Does the CompletionLexer work for Python? ... ok
Are special characters displayed correctly? ... ok
ERROR

======================================================================
ERROR: test suite for <class 'IPython.frontend.qt.console.tests.test_kill_ring.TestKillRing'>
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/minrk/Library/Python/2.7/lib/python/site-packages/nose/suite.py", line 208, in run
    self.setUp()
  File "/Users/minrk/Library/Python/2.7/lib/python/site-packages/nose/suite.py", line 291, in setUp
    self.setupContext(ancestor)
  File "/Users/minrk/Library/Python/2.7/lib/python/site-packages/nose/suite.py", line 314, in setupContext
    try_run(context, names)
  File "/Users/minrk/Library/Python/2.7/lib/python/site-packages/nose/util.py", line 478, in try_run
    return func()
  File "/Users/minrk/dev/ip/mine/IPython/frontend/qt/console/tests/test_kill_ring.py", line 17, in setUpClass
    cls._app = QtGui.QApplication([])
RuntimeError: A QApplication instance already exists.

----------------------------------------------------------------------
Ran 13 tests in 1.690s

FAILED (errors=1)
PySide.__version__ = '1.1.0'
PySide.QtCore.__version__ = '4.8.1'

both from Nokia binaries

OSX 10.7.3, System Python 2.7.1, IPython master, etc.


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