If you want to use released versions of pyjoulescope, Install from PyPI. It’s quick and easy! If you want unrelease pyjoulescope software or you want to develop pyjoulescope, see Install from Source.
You will need to install Python 3.8+ x64 for your platform, if it is not already on your system.
Download the latest Python release for Windows. If in doubt, select the “Windows x86-64 executable installer”. Install Python and allow it to update your path. Open a Command Prompt and type:
> python -VV Python 3.9.4 (tags/v3.9.4:1f2e308, Apr 6 2021, 13:40:21) [MSC v.1928 64 bit (AMD64)]
Note that Windows usually installs python 3 as python.exe. This documentation often uses the executable “python3”.
The easiest way to install Python on macOS is through Homebrew. Follow the instructions to install brew, then type:
$ brew install python3 libusb $ python3 -VV
Use your package manager to install python. On Debian-based systems, including Ubuntu, use apt:
$ sudo apt install python3-dev python3-pip libusb-1.0 $ python3 -VV
The user must have sufficient permissions to access Joulescopes. Many linux systems, including Debian, Ubuntu, and Raspberry Pi OS, use udev. We include a udev script in the repository to give permissions to all users. To install it:
$ wget https://raw.githubusercontent.com/jetperch/pyjoulescope/master/99-joulescope.rules $ sudo cp 99-joulescope.rules /etc/udev/rules.d/ $ sudo udevadm control --reload-rules
PyPI is the “Python Package Index” which distributes most python packages. To install this python package from PyPI using pip (or pipenv):
pip3 install -U joulescope
That’s it! The extra “-U” will upgrade to the latest version, just in case.
The joulescope package requires Python 3.6+ and 64-bit Python. If your system does not meet these requirements, then the installation will fail with an error message.
If you get an error showing “CERTIFICATE_VERIFY_FAILED”, your corporate IT policy is likely blocking the pypi SSL certificate. You have several options:
Contact your IT department to correct the problem.
Ignore the SSL validation (slight security risk):
pip3 install --trusted-host pypi.org --trusted-host files.pythonhosted.org -U joulescope
For more discussion, see StackOverflow <https://stackoverflow.com/questions/25981703/pip-install-fails-with-connection-error-ssl-certificate-verify-failed-certi>.
The pyjoulescope package repository is open-source on GitHub. You can clone the repository:
git clone https://github.com/jetperch/pyjoulescope.git
You can also download the tarbal (Linux, macOS):
curl -Ol https://github.com/jetperch/pyjoulescope/tarball/master
or the ZIP file (Windows):
Change directory into the extracted file. Install the developer dependencies:
pip3 install -U -e .[dev]
If you plan on using pyjoulescope, you should install it:
pip3 install -U .
Although not required, the developers recommend using [virtualenv](https://virtualenv.pypa.io/en/latest/) to minimize any dependency conflicts with different python applications.
First install virtualenv:
pip3 install -U virtualenv
And then create a new virtual environment:
You need to activate the virtual environment whenever you start a new terminal.
On POSIX (Linux, Mac OS X with homebrew):
virtualenv c:\venv\joulescope source c:\venv\joulescope\Scripts\activate
If you plan on developing pyjoulescope, you probably want to run directly from the source code directory. First, install the dependencies:
pip3 install -U -r requirements.txt
You can then build the native modules and adjust your PYTHONPATH so that python finds the joulescope package.
For Linux and macOS:
python setup.py build_ext --inplace export PYTHONPATH=`cwd`
python setup.py build_ext --inplace set PYTHONPATH=%cd%