Dear all, 

as a Leo user trying with Python 3 (currently Python 3.4) I have noted some 
incompatibilities proper of such bewteen Python 2 and Python 3. I would 
like to refer to some of them and the error messages that apperar in the 
log pane, in the hope that they help to improve Leo. By the way: such 
problems do not arise when starting Leo with Python 2.7. 

The error messages show a possibly common problem when trying to import the 
plugin leo.plugins.viewrendered.

Still a happy New Year.     Juaco


1. Starting of Leo
 
Error message in log pane: loadOnePlugin: can not load enabled plugin: 
leo.plugins.viewrendered

2. Help for command: Pressing of F11
 
Error message in log pane: 

loadOnePlugin: can not load enabled plugin: leo.plugins.viewrendered

exception executing command

Traceback (most recent call last):

File "/....../Leo5.0-final/leo/core/leoCommands.py", line 556, in doCommand

val = command(event)

File "/....../Leo5.0-final/leo/core/leoEditCommands.py", line 7828, in 
helpForCommand

c.putHelpFor(s)

File "/....../Leo5.0-final/leo/core/leoCommands.py", line 8378, in 
putHelpFor

assert vr # For unit testing.

AssertionError

3. Python help: Pressing F12
Error message in log pane, after entering for instance "print" in the 
minibuffer line (Python help: print <enter>):


loadOnePlugin: can not load enabled plugin: leo.plugins.viewrendered

4. GUI:   Plugins --> Core --> Plugins Menu
 
Choosing of the GUI option Plugins --> Core --> Plugins produces: 

 loadOnePlugin: can not load enabled plugin: leo.plugins.viewrendered

exception executing command

Traceback (most recent call last):

File "/....../Leo5.0-final/leo/core/leoCommands.py", line 556, in doCommand

val = command(event)

File "/....../Leo5.0-final/leo/plugins/plugins_menu.py", line 342, in about

c.putHelpFor(msg,short_title=self.name)

File "/....../Leo5.0-final/leo/core/leoCommands.py", line 8378, in 
putHelpFor

assert vr # For unit testing.

AssertionError

5. GUI: Plugins --> bibtex
Choosing of the GUI option Plugins --> bibtex produces: 


loadOnePlugin: can not load enabled plugin: leo.plugins.viewrendered 

exception executing command

Traceback (most recent call last):

File "/dn/..../Leo5.0-final/leo/core/leoCommands.py", line 556, in doCommand

val = command(event)

File "/dn/..../Leo5.0-final/leo/plugins/plugins_menu.py", line 342, in about

c.putHelpFor(msg,short_title=self.name)

File "/dn/..../Leo5.0-final/leo/core/leoCommands.py", line 8378, in 
putHelpFor

assert vr # For unit testing.

AssertionError

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