KeyError: 'execution_count' in IPython console

[Shaunakde]

Description of your problem

Mayavi doesn't work / stopped working out of the blue.
When I try to use mayavi from within Spyder I get the following error message in response to the code from mayavi import mlab:

File "<ipython-input-1-c11ad98c1cb2>", line 1, in <module>
    runfile('/home/shaunak/Work/ChangeDet_2016/mayavi.py', wdir='/home/shaunak/Work/ChangeDet_2016')

  File "/home/shaunak/anaconda2/envs/mayavi/lib/python2.7/site-packages/spyder/utils/site/sitecustomize.py", line 866, in runfile
    execfile(filename, namespace)

  File "/home/shaunak/anaconda2/envs/mayavi/lib/python2.7/site-packages/spyder/utils/site/sitecustomize.py", line 94, in execfile
    builtins.execfile(filename, *where)

  File "/home/shaunak/Work/ChangeDet_2016/mayavi.py", line 97, in <module>
    from mayavi import mlab

  File "mayavi.py", line 97, in <module>
    from mayavi import mlab

ImportError: cannot import name mlab

What steps will reproduce the problem?

1. Install a new environment in Spyder (conda install --name mayavi python=2 anaconda)
2. Install mayavi (conda install --name mayavi mayavi)
3. Run this simple code:

from mayavi import mlab
mlab.points3d(1,1,1)

What is the expected output? What do you see instead?
I would expect to see a point plotted as requested. Instead I get the error message described above.

Please provide any additional information below
Additional details: http://stackoverflow.com/questions/40847261/spyder-and-issues-with-mayavi
I have tried downgrading Sypder. But the problem remains.

Versions and main components

• Spyder Version: Python 2.7.12 |Anaconda custom (64-bit)| (default, Jul 2 2016, 17:42:40)
• Python Version: 2.7
• Operating system: Ubuntu 14.04

Dependencies

jedi >=0.8.1 : 0.8.1 (OK)
matplotlib >=1.0 : 1.4.3 (OK)
nbconvert >=4.0 : 4.2.0 (OK)
numpy >=1.7 : 1.9.2 (OK)
pandas >=0.13.1 : 0.16.2 (OK)
pep8 >=0.6 : 1.6.2 (OK)
psutil >=0.3 : 2.2.1 (OK)
pyflakes >=0.5.0 : 0.9.2 (OK)
pygments >=2.0 : 2.1.3 (OK)
pylint >=0.25 : 1.6.4 (OK)
qtconsole >=4.2.0: 4.2.1 (OK)
rope >=0.9.4 : 0.10.3 (OK)
sphinx >=0.6.6 : 1.3.1 (OK)
sympy >=0.7.3 : 0.7.6 (OK)

[Shaunakde]

Closing the issue. Multiple re-installations seemed to have caused the problem to go away.

[Shaunakde]

Update: This error seems to occur if the script has previously imported Matplotlib 3d tools:
from mpl_toolkits.mplot3d import Axes3D

[Shaunakde]

Update: It seems independent of if the Matplotlib3d lib was called, the same code that worked before crashes randomly.

[WARNING:traitlets:kernel restarted
Traceback (most recent call last):
  File "/home/shaunak/anaconda2/envs/mayavi/lib/python2.7/site-packages/qtconsole/base_frontend_mixin.py", line 163, in _dispatch
    handler(msg)
  File "/home/shaunak/anaconda2/envs/mayavi/lib/python2.7/site-packages/spyder/widgets/ipythonconsole/namespacebrowser.py", line 180, in _handle_execute_reply
    exec_count = msg['content']['execution_count']
KeyError: 'execution_count'](`url`)

[ccordoba12]

Could you update to Spyder 3.0.2 and try again?

[Shaunakde]

I tested this on both Spyder 3.0.2 Python 2.7.10 64bits, Qt 4.8.6, PyQt4 (API v2) 4.11.3 on Linux and an older one. The same script will not run when run all at once. But if I use cells to stop the execution and manually proceed, weirdly it runs fine.