ipython console does not open up.

[spyder-bot]

From yacc...@gmail.com on 2013-09-30T09:56:48Z

Spyder Version: 2.2.3
Python Version: 2.7.5
Qt Version : 4.8.4, PyQt4 (API v2) 4.10.1 on Windows
pyflakes 0.5.0 : None (OK)
pep8 >=0.6 : 1.4.5 (OK)
IPython >=0.13;<1.0: 0.13.2 (OK)
rope >=0.9.2 : 0.9.4 (OK)
sphinx >=0.6.6 : 1.1.3 (OK)
matplotlib >=1.0 : None (NOK)
sympy >=0.7.0 : None (NOK)
pylint >=0.25 : 0.27.0 (OK)

What steps will reproduce the problem?

1. Right Click in IPython console tab, click on "Open an IPython console".
   1. IPython console tab stays empty.
   2. Console tab "IP: Kernel" shows:
      'import sitecustomize' failed; use -v for traceback
      [IPKernelApp] To connect another client to this kernel, use:
      [IPKernelApp] --existing kernel-17536.json
   3. Sidenote: trying to connect to an existing kernel works.
   4. Sidenote: the kernel mentioned in the console tab does not work, so I guess the ipython kernel dies. What is the expected output? What do you see instead? Expected behaviour would be that an ipython console shows.

Please provide any additional information below

. Most irritating here is that it seems very hard to configure the -v for the child python process.

Original issue: http://code.google.com/p/spyderlib/issues/detail?id=1586

[spyder-bot]

From yacc...@gmail.com on 2013-09-30T08:04:35Z

Running with SPYDER_DEBUG=4 I get:

Traceback (most recent call last):^M
File "c:\python27\lib\site.py", line 498, in execsitecustomize^M
import sitecustomize^M
File "c:\python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 294, in ^M
from IPython.core.debugger import Pdb as ipyPdb^M
File "c:\python27\lib\site-packages\IPython__init__.py", line 43, in ^M
from .config.loader import Config^M
File "c:\python27\lib\site-packages\IPython\config__init__.py", line 16, in ^M
from .application import *^M
File "c:\python27\lib\site-packages\IPython\config\application.py", line 67, in ^M
""".strip().format(app=os.path.basename(sys.argv[0]))^M
AttributeError: 'module' object has no attribute 'argv'^M

[spyder-bot]

From yacc...@gmail.com on 2013-09-30T08:08:08Z

sys.argv missing seems to be an artifact of sitecustomize.py being run really early.

[spyder-bot]

From yacc...@gmail.com on 2013-09-30T08:14:48Z

Not sure how to fix that, spyder's sitecustomize does import IPython.core.debugger which seems to rely on sys.argv, which is not available at sitecustomize time.

[spyder-bot]

From yacc...@gmail.com on 2013-09-30T08:18:05Z

#XXX If Matplotlib is not imported first, the next IPython import will fail

Well, this is marked just a little above the failing ipython import => I have no matplotlib installed (and pip install on my windows box fails with some missing header file).

I do not need matplotlib for my use case, but it seems the case that without matplotlib ipython console is broken for spyder.

[spyder-bot]

From yacc...@gmail.com on 2013-09-30T08:28:49Z

Ok, changing the IPython import to provide an sys.argv seems to fix it, should be benign:

1.) ipython uses sys.argv[0] only for help strings.
2.) the change uses a visiable sentinel string
3.) the change removes sys.argv after the place that needs it.

the needed change is: (no patch file, I've patched this in a deployed version of spyder, on a Windows box, OTOH, it's a rather simple change, and somebody needs to review it anyway before applying it.)

spyderlib/widgets/externalshell/sitecustomize.py around line 294:

if not hasattr(sys, "argv"):
    sys.argv = ["IPYTHON_IMPORT_WORKAROUND"]
from IPython.core.debugger import Pdb as ipyPdb
if getattr(sys, "argv", None) == ["IPYTHON_IMPORT_WORKAROUND"]:
    del sys.argv

[spyder-bot]

From ccordoba12 on 2015-01-01T16:00:13Z

I fixed this one a long time ago

Status: Duplicate
Mergedinto: 1473