Installing external python packages for QGIS 3?

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.


This happened to me as well and I had both QGIS 2.14 and 3.8 installed then. I fixed the pip install issue in my OSGeo4W shell by uninstalling QGIS2.14 from my computer and re-installing QGIS3.8.

If you see the "SNIMissingWarning" in the error message, check out urllib3's documentation here and you'll find that your OSGeo4W shell might be running on an older version of Python (< 2.7.9), which can cause pip install to not function properly when urllib retrieves the package.

Open your OSGeo4W shell and type in below to check the Python version running in your shell.

C:\>python

If it's less than 2.7.9, then you might need to upgrade your QGIS to version 3 and uninstall older versions if any (note that some newer v2 QGIS have Python environments higher than 2.7.9, e.g. QGIS2.18). Once you have an OSGeo4W shell running on a newer version of Python, follow the steps below to install third-party Python packages for QGIS. 

C:\>py3_env
C:\>SET PYTHONPATH=
C:\>SET PYTHONHOME=C:\PROGRA~1\QGIS3~1.8\apps\Python37
C:\>PATH 
C:\PROGRA~1\QGIS3~1.8\apps\Python37;C:\PROGRA~1\QGIS3~1.8\apps\Python37\Scripts;{app};C:\PROGRA~1\QGIS3~1.8\apps\Python27\Scripts;C:\PROGRA~1\QGIS3~1.8\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBem;C:\Program Files\R\R-3.5.1\bin\x64
C:\>python -m pip install package

Tags:

Pyqgis

Python 3

Qgis 3

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