startup issue using virtual environment

[GC1102]

Description

What steps will reproduce the problem?

To start spyder3 from a linux (ubuntu) virtual environment using python 3

Traceback

  File "/home/gianni/python3_virt/lib/python3.5/site-packages/spyder/app/mainwindow.py", line 1961, in valid_project
    if bool(self.projects.get_active_project_path()):
AttributeError: 'NoneType' object has no attribute 'get_active_project_path'

Versions

• Spyder version: 3.3.0
• Python version: 3.5.2
• Qt version: 5.9.3
• PyQt5 version: 5.9.2
• Operating System: Linux 4.4.0-131-generic

Dependencies

pyflakes >=0.6.0  :  2.0.0 (OK)
pycodestyle >=2.3 :  2.4.0 (OK)
pygments >=2.0    :  2.2.0 (OK)
sphinx >=0.6.6    :  1.7.5 (OK)
rope >=0.9.4      :  0.10.7 (OK)
jedi >=0.9.0      :  0.12.1 (OK)
psutil >=0.3      :  5.4.6 (OK)
nbconvert >=4.0   :  5.3.1 (OK)
pandas >=0.13.1   :  None (NOK)
numpy >=1.7       :  1.14.5 (OK)
sympy >=0.7.3     :  None (NOK)
cython >=0.21     :  None (NOK)
qtconsole >=4.2.0 :  4.3.1 (OK)
IPython >=4.0     :  6.4.0 (OK)
matplotlib >=2.0.0:  2.2.2 (OK)
pylint >=0.25     :  1.9.2 (OK)

[ccordoba12]

This is a duplicate of issue #7403 and it'll be fixed in our next release.