Installation

snps is available on the Python Package Index. Install snps (and its required Python dependencies) via pip:

$ pip install snps

Installation and Usage on a Raspberry Pi

The instructions below provide the steps to install snps on a Raspberry Pi (tested with “Raspberry Pi OS (32-bit) Lite”, release date 2020-08-20). For more details about Python on the Raspberry Pi, see here.

Note: Text after a prompt (e.g., $) is the command to type at the command line. The instructions assume a fresh install of Raspberry Pi OS and that after logging in as the pi user, the current working directory is /home/pi.

1. Install pip for Python 3:

   pi@raspberrypi:~ $ sudo apt install python3-pip
   

   Press “y” followed by “enter” to continue. This enables us to install packages from the Python Package Index.

2. Install the venv module:

   pi@raspberrypi:~ $ sudo apt install python3-venv
   

   Press “y” followed by “enter” to continue. This enables us to create a virtual environment to isolate the snps installation from other system Python packages.

3. Install ATLAS:

   pi@raspberrypi:~ $ sudo apt install libatlas-base-dev
   

   Press “y” followed by “enter” to continue. This is required for NumPy, a dependency of snps.

4. Create a directory for snps and change working directory:

   pi@raspberrypi:~ $ mkdir snps
   pi@raspberrypi:~ $ cd snps
   

5. Create a virtual environment for snps:

   pi@raspberrypi:~/snps $ python3 -m venv .venv
   

   The virtual environment is located at /home/pi/snps/.venv.

6. Activate the virtual environment:

   pi@raspberrypi:~/snps $ source .venv/bin/activate
   

   Now when you invoke Python or pip, the virtual environment’s version will be used (as indicated by the (.venv) before the prompt). This can be verified as follows:

   (.venv) pi@raspberrypi:~/snps $ which python
   /home/pi/snps/.venv/bin/python
   

7. Install snps:

   (.venv) pi@raspberrypi:~/snps $ pip install snps
   

8. Start Python:

   (.venv) pi@raspberrypi:~/snps $ python
   Python 3.7.3 (default, Jul 25 2020, 13:03:44)
   [GCC 8.3.0] on linux
   Type "help", "copyright", "credits" or "license" for more information.
   >>>
   

9. Use snps; examples shown in the README should now work.

10. At completion of usage, the virtual environment can be deactivated:

    (.venv) pi@raspberrypi:~/snps $ deactivate
    pi@raspberrypi:~/snps $