Greetings Peter,
Pleased to meet you.

Following your suggestion I was able to install Mnemosyne via the package 
manager via:
sudo apt install mnemosyne

However that was not without encountering errors which were eliminated when 
I remove the "...2.6.1 Python3 install" via:
a)  sudo python3 setup.py install *--record files.txt*
b)  sudo rm -rf Mnemosyne-2.6.1-py3.6.eggudo xargs rm -rf < files.txt
c)  sudo rm -rf Mnemosyne-2.6.1-py3.6.egg   (From the 
*/usr/local/lib/python3.6/dist-packages/Mnemosyne-2.6-py3.6.egg*/   folder)

After which I got what appeared to be a clean install.

HOWEVER:
Upon running Mnemosyne from the GUI Mnemosyne failed to launch.
Upon running Mnemosyne from terminal I got back:

kevin@Frodo4-MSI:~$ mnemosyne
An unexpected error has occurred.
*===========*

*Please forward the following info to the developers:*
Traceback (innermost last):
  File "/usr/bin/mnemosyne", line 132, in <module>
    from PyQt5 import QtWebEngineWidgets  # Needs to happen first for some 
reason.
 ImportError: cannot import name 'QtWebEngineWidgets'
An unexpected error has occurred.
Please forward the following info to the developers:

Traceback (innermost last):
  File "/usr/bin/mnemosyne", line 132, in <module>
    from PyQt5 import QtWebEngineWidgets  # Needs to happen first for some 
reason.
 ImportError: cannot import name 'QtWebEngineWidgets'

*===========*
Again I call upon your invaluable expertise to help me resolve this install 
successfully.
Thanks and
Cheers
Kevin

**********************





On Tuesday, 3 September 2019 23:49:12 UTC-4, Peter Bienstman wrote:
>
> Hi,
>
> I would suggest you first try to install Mnemosyne from Ubuntu's package 
> manager. Even if it's not the latest version, it will pull in all the 
> dependencies, so that you'll have an easier time manually installing the 
> latest version. 
>
> Cheers, 
>
> Peter 
>
>
> ------------------------------
> *From:* MrJay <[email protected] <javascript:>>
> *Sent:* Tuesday, 3 September 2019 21:15
> *To:* mnemosyne-proj-users
> *Subject:* [mnemosyne-proj-users] Mnemosyne will not launch -- Import 
> error - QtWebEngineWidgets
>
> Greetings,
>
> After doing battle for many days installing the various components I 
> finally got Mnemosyne to compile, only to have it NOT LAUNCH with the 
> following errors (below).
>
> *My system*" Ubuntu 18.03.3 LTS, (uname = Linux Frodo4-MSI 
> 5.0.0-25-generic #26~18.04.1-Ubuntu SMP Thu Aug 1 13:51:02 UTC 2019 x86_64 
> x86_64 x86_64 GNU/Linux)
>
> *Attempting to install:* Mnamosyne 2.6.1
>
> *Error output =:*
>
> *kevin@Frodo4-MSI:~*/Downloads/Extracted3/Mnemosyne-2.6.1$ mnemosyne
> Log body:
>  An unexpected error has occurred.
> Please forward the following info to the developers:
>
> Traceback (innermost last):
>   File "/usr/local/bin/mnemosyne", line 4, in <module>
>     __import__('pkg_resources').run_script('Mnemosyne==2.6.1', 'mnemosyne')
>   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 
> 658, in run_script
>     self.require(requires)[0].run_script(script_name, ns)
>   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 
> 1438, in run_script
>     exec(code, namespace, namespace)
>   File 
> "/usr/local/lib/python3.6/dist-packages/Mnemosyne-2.6.1-py3.6.egg/EGG-INFO/scripts/mnemosyne",
>  
> line 145, in <module>
>     from PyQt5 import QtWebEngineWidgets  # Needs to happen first for some 
> reason.
>  ImportError: cannot import name 'QtWebEngineWidgets'
>
> An unexpected error has occurred.
> Please forward the following info to the developers:
>
> Traceback (innermost last):
>   File "/usr/local/bin/mnemosyne", line 4, in <module>
>     __import__('pkg_resources').run_script('Mnemosyne==2.6.1', 'mnemosyne')
>   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 
> 658, in run_script
>     self.require(requires)[0].run_script(script_name, ns)
>   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 
> 1438, in run_script
>     exec(code, namespace, namespace)
>   File 
> "/usr/local/lib/python3.6/dist-packages/Mnemosyne-2.6.1-py3.6.egg/EGG-INFO/scripts/mnemosyne",
>  
> line 145, in <module>
>     from PyQt5 import QtWebEngineWidgets  # Needs to happen first for some 
> reason.
>  ImportError: cannot import name 'QtWebEngineWidgets'
> An unexpected error has occurred.
> Please forward the following info to the developers:
>
> Traceback (innermost last):
>   File "/usr/local/bin/mnemosyne", line 4, in <module>
>     __import__('pkg_resources').run_script('Mnemosyne==2.6.1', 'mnemosyne')
>   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 
> 658, in run_script
>     self.require(requires)[0].run_script(script_name, ns)
>   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 
> 1438, in run_script
>     exec(code, namespace, namespace)
>   File 
> "/usr/local/lib/python3.6/dist-packages/Mnemosyne-2.6.1-py3.6.egg/EGG-INFO/scripts/mnemosyne",
>  
> line 145, in <module>
>     from PyQt5 import QtWebEngineWidgets  # Needs to happen first for some 
> reason.
>  ImportError: cannot import name 'QtWebEngineWidgets'
>
> Any assistance you can offer to get this package working would be greatly 
> appreciated. 
> FYI I use Mnemosyne extensive in my college pursuits, which start again, 
> tomorrow.
> Thanks for you help
> Kevin
>  =================
>
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