[Qgis-user] QGIS 2.18 vs. QGIS 3

[Andreas Neumann]

Hi Strumbi,

They can be installed and run in parallel. They have independent settings.

The only restriction is: once you have saved a project in QGIS 3, there 
may be no way back to 2.18.

The other thing to watch out is plugins or Python code: plugins and 
Python code from QGIS 2.x don't run in QGIS 3.x. They have to be revised 
because of the change from Python 2 to Python 3 and qt4 to qt5. In 
addition, the QGIS API changed considerably. Theoretically, a plugin can 
be written to work in both QGIS 2 and QGIS 3, but in practice, such 
plugins don't exist very often.

Greetings,

Andreas


On 01.03.2018 10:22, Velizar Strumberger wrote:
> Hello
> I apologize if this question has been asked already. Should I 
> uninstall QGIS 2.18 before I install QGIS 3.
> Thank you
> Strumbi
>
>
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