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sbi requires Python 3.6 or higher. We recommend to use a conda virtual environment (Miniconda installation instructions). If conda is installed on the system, an environment for installing sbi can be created as follows:

# Create an environment for sbi (indicate Python 3.6 or higher); activate it
$ conda create -n sbi_env python=3.7 && conda activate sbi_env

Independent of whether you are using conda or not, sbi can be installed using pip:

$ pip install sbi

To test the installation, drop into a python prompt and run

from sbi.examples.minimal import simple
posterior = simple()