AttributeError: Nonetype has no attribute "clear" when right clicking in the empty project explorer with no project open

[dc-avasilev]

File "/usr/local/anaconda3/lib/python3.6/site-packages/spyder/widgets/explorer.py", line 480, in contextMenuEvent
    self.update_menu()
  File "/usr/local/anaconda3/lib/python3.6/site-packages/spyder/widgets/explorer.py", line 458, in update_menu
    self.menu.clear()
AttributeError: 'NoneType' object has no attribute 'clear'

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click right button on mouse in cleared project manager window

[CAM-Gerlach]

Yup, was able to reproduce. Specifically, the window was "cleared" by closing the current project, then reopening it from the menu. @ccordoba12 , do we want to just catch the error and pass (or otherwise better handle it), or go further and disable opening the project explorer when no project is open, since it serves no real purpose?

[CAM-Gerlach]

Also, I get a series of followup errors:

  File "C:\Anaconda3\lib\site-packages\qtconsole\console_widget.py", line 420, in eventFilter
    event.button() == QtCore.Qt.MidButton and \
AttributeError: 'QContextMenuEvent' object has no attribute 'button'

Which continue until I tell it to hide the error dialog for future errors (or presumably restart spyder).

[ccordoba12]

do we want to just catch the error and pass

Yep, I think it's the easiest thing to do.

or go further and disable opening the project explorer when no project is open, since it serves no real purpose?

There's no harm in showing the project explorer empty.

Also, I get a series of followup errors

This is odd. I don't know why those errors are generated.

[CAM-Gerlach]

Okay, cool. I'll get to it Soon™

[ccordoba12]

@dalthviz, please work on this one by catching AttributeError in the right places.