fix(accPlot): check dataframe index is datetime #168

	# Run flake8 linter

	name: flake8

	on:
	push:
	branches:
	- '**'
	pull_request:

	jobs:
	flake8:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

	- name: Setup python
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install linter
	run: \|
	pip install --upgrade pip
	pip install flake8 pytest

	- name: Lint with flake8
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics

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