The `__future__` we relied on is now, where the 3 specific things are
all included [since Python 3.0](https://docs.python.org/3/library/__future__.html):
* absolute_import
* print_function
* unicode_literals
* division
These import statements are no-ops and are no longer necessary.
Replace the project global linting rule excludes (as defined in .pep8) with
fine-grained "# noqa" annotations.
By using noqa annotation the excludes are made on a per line basis instead of
globally.
These annotations are used where we make deliberate deviations from the standard
linting rules.
To lint the Python code in the project:
$ flake8
To install flake8:
$ pip install flake8
See https://flake8.readthedocs.org/en/latest/ for details.
To enable checking of the PEP-8 naming conventions, install the optional
extension pep8-naming:
$ pip install pep8-naming
To enable checking of blind "except:" statements, install the optional
extension flake8-blind-except:
$ pip install flake8-blind-except
To enable checking of import statement order, install the optional
extension flake8-import-order:
$ pip install flake8-import-order
* E101: indentation contains mixed spaces and tabs
* E111: indentation is not a multiple of four
* E128: continuation line under-indented for visual indent
* E302: expected 2 blank lines, found 1
* W191: indentation contains tabs
