Spyder does not support code-completion and does not show help since update to version 3.1.4

[msgnaf]

Description of your problem

I'm experiencing issues with the interactive help pane (View -> Panes -> Help). Before updating Anaconda I was able to show object documentation for any object pressing Ctrl+I (inspect current object). This was especially important for me since I also was able to see my own docstrings for my modules in this pane. I am also no more able to use code-completion (I checked that I use the correct keyboard-shortcut Ctrl+space).

What steps will reproduce the problem?

1. Simple code sample that was previously shown nicely formatted in the help pane when pressing Ctrl+I to inspect the function (with the cursor between the braces of test_fun() ):

   def test_fun():
       """This is my testfunction.
       
       Parameters:
           None
       Returns:
           ret : The return value.
               str
       """
       ret = "MyTestFunction"
       return ret
   

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

I expect the help pane to properly show me the docstring in a nice format. I also expect auto-completion when pressing Ctrl+Space. Current behaviour when pressing Ctrl+I to inspect an object: The help pane switches to a blank screen and the source dropdown switches to "Editor". Behavior when pressing Ctrl+Space when the cursor is behind a string like "test_fu": Nothing happens. There is also no dropdown for possible completions.

Versions and main components

• Spyder Version: 3.1.4
• Python Version: 3.6.1 (Anaconda version 4.3.17)
• Qt Version: 5.6.2
• PyQt Version: PyQt5 5.6
• Operating system: Windows 7

Dependencies

jedi >=0.9.0 : 0.9.0 (OK)
matplotlib >=1.0 : 2.0.1 (OK)
nbconvert >=4.0 : 5.1.1 (OK)
numpy >=1.7 : 1.12.1 (OK)
pandas >=0.13.1 : 0.19.2 (OK)
pep8 >=0.6 : 1.7.0 (OK)
pyflakes >=0.6.0 : 1.5.0 (OK)
pygments >=2.0 : 2.2.0 (OK)
pylint >=0.25 : 1.6.4 (OK)
qtconsole >=4.2.0: 4.3.0 (OK)
rope >=0.9.4 : 0.9.4-1 (OK)
sphinx >=0.6.6 : 1.5.4 (OK)
sympy >=0.7.3 : 1.0 (OK)

[ccordoba12]

Thanks a lot for your report. This is essentially a duplicate of issue #4410.