[ENH] add utility function to compute expected value #153

	## Disclaimer - This GitHub Actions workflow performs a static analysis of the python code.

	# Name the workflow
	name: code_quality

	# Define when it runs
	on:
	push:
	paths:
	- '**.py'
	pull_request:
	paths:
	- '**.py'

	# Jobs that define the workflow
	jobs:
	# Name of the job running pylint
	pylint:

	# Define the OS
	runs-on: ubuntu-latest

	# Steps that define the job
	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v3
	with:
	python-version: 3.9

	- uses: actions/cache@v3
	with:
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-pylint
	restore-keys: \|
	${{ runner.os }}-pip-pylint

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pylint

	- name: Analyse the code with pylint
	run: \|
	pylint --exit-zero narps_open > pylint_report_narps_open.txt
	pylint --exit-zero tests > pylint_report_tests.txt

	- name: Archive pylint results
	uses: actions/upload-artifact@v3
	with:
	name: pylint-reports-python
	path: \|
	pylint_report_narps_open.txt
	pylint_report_tests.txt
	retention-days: 15

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