Added flake8 invoke task to make it easy for developers to run flake8 locally identical to how it gets run during a PR

Author: tleonhardt

tasks.py

@@ -227,3 +227,11 @@ def pypi_test(context):
     "Build and upload a distribution to https://test.pypi.org"
     context.run('twine upload --repository-url https://test.pypi.org/legacy/ dist/*')
 namespace.add_task(pypi_test)
+
+
+# Flake8 - linter and tool for style guide enforcement and linting
+@invoke.task
+def flake8(context):
+    "Run flake8 linter and tool for style guide enforcement"
+    context.run("flake8 --ignore=E252 --max-complexity=31 --max-line-length=127 --show-source --statistics")
+namespace.add_task(flake8)