clean up sample project

.pep8speaks.yml

-# File : .pep8speaks.yml
-
-scanner:
-    diff_only: True  # If False, the entire file touched by the Pull Request is scanned for errors. If True, only the diff is scanned.
-    linter: pycodestyle  # Other option is flake8
-
-pycodestyle:  # Same as scanner.linter value. Other option is flake8
-    max-line-length: 120  # Default is 79 in PEP 8
-    ignore:  # Errors and warnings to ignore
-        - W504  # line break after binary operator
-        - E402  # module level import not at top of file
-        - E731  # do not assign a lambda expression, use a def
-        - C406  # Unnecessary list literal - rewrite as a dict literal.
-        - E741  # ambiguous variable name
-        - F401
-        - F841
-
-no_blank_comment: True  # If True, no comment is made on PR without any errors.
-descending_issues_order: False  # If True, PEP 8 issues in message will be displayed in descending order of line numbers in the file
-
-message:  # Customize the comment made by the bot,
-    opened:  # Messages when a new PR is submitted
-        header: "Hello @{name}! Thanks for opening this PR. "
-                # The keyword {name} is converted into the author's username
-        footer: "Do see the [Hitchhiker's guide to code style](https://goo.gl/hqbW4r)"
-                # The messages can be written as they would over GitHub
-    updated:  # Messages when new commits are added to the PR
-        header: "Hello @{name}! Thanks for updating this PR. "
-        footer: ""  # Why to comment the link to the style guide everytime? :)
-    no_errors: "There are currently no PEP 8 issues detected in this Pull Request. Cheers! :beers: "