code style for device builder (and other tools in this repo)

.github/workflows/pep8.yml

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+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the action will run. 
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "check_code_style"
+  check_code_style:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE,  so your job can access it
+      - uses: actions/checkout@v2
+
+      # Runs a single command using the runners shell
+      #- name: Run a one-line script
+      #  run: echo Hello, world!
+
+      # Runs a set of commands using the runners shell
+      - name: check pycodestyle syntax
+        run: |
+          pip install pycodestyle
+          # E501 ignore long lines (e.g. larger than 80 chars)
+          # E722 do not use bare 'except'
+          # W605 invalid escape sequence '\ ' 
+          pycodestyle --ignore=E501,E722,W605 src/DeviceBuilder.py
+          pycodestyle --ignore=E501,E722,W605 src/pki2include.py
+          pycodestyle --ignore=E501,E722,W605 src/swag2cbor.py
+          pycodestyle --ignore=E501,E722,W605 src/cbor2include.py
+          pycodestyle --ignore=E501,E722,W605 src/compareJson.py