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.

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.
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.
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.

Create a directory for snps and change working directory:

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

Create a virtual environment for snps:
```
pi@raspberrypi:~/snps $ python3 -m venv .venv
```
The virtual environment is located at /home/pi/snps/.venv.
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
```

Install snps:

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

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.
>>>

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

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

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