5

While there are tools and methods for qgis 2 i cannot figure out for 3 I want to install external python packages such as sqlalchemy etc

I tried the following things :

  1. Tried to download osgeo4w for qgis 3.02 as of now there is no advance installation option like it use to be before http://download.osgeo.org/osgeo4w/osgeo4w-setup-x86_64.exe .

  2. Tried to install setuptools but its not working in the 2nd step. it returns 1. https://www.lutraconsulting.co.uk/blog/2016/03/02/installing-third-party-python-modules-in-qgis-windows/

  3. Went to python of the C:\Program Files\QGIS 3.0\bin and tried pip but it does not work

5

I encounter that problem after installing QGIS 3, too. Therefore, I install Python packages in following way:

  1. Copy python3.dll and python36.dll in (QGIS_PATH)/bin folder to (QGIS_PATH)/apps/Python36/ folder.
  2. Open command prompt as administrator. Go to Python36 folder. cd c:/(QGIS_PATH)/apps/Python36
  3. Install Pyhon packages by python -m pip install package_name.

I use that way, because I couldn't install packages using OSGeo Shell. When I try in OSGeo Shell, Python crashes.

EDIT: This was one solution that I was using. But OSGeo4W shell with python3 post as @Luke states in comment has exact solution.

  • 1
    Did you set up your python 3 environment properly by running the py3_env command? gis.stackexchange.com/a/277842/2856 – user2856 May 13 '18 at 10:33
  • No. After copying files, I just opened windows command prompt, and run python -m pip install PACKAGE in Python36 folder. When I tried same steps in OSGeo Shell, I failed. – Kadir Şahbaz May 13 '18 at 10:46
  • @Luke I get it now. But why is it default setting. Because of Python 2? – Kadir Şahbaz May 15 '18 at 13:33
  • Probably because QGIS 2.18 is the long-term support version and requires Python 2 so they make that the default – user2856 May 15 '18 at 20:23

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