run.py

from flake8.main.application import Application as Flake8

from myproject.app import create_app

# Code in this module gets run every time the app restarts in debug mode.
# Therefore the linter runs every time the app restarts.

CYAN = '\x1b[1;36m'
RED = '\x1b[0;31m'
RESET = '\x1b[0m'

FORMAT = CYAN + '%(path)s ' + RESET + '%(row)d:%(col)d ' + RED + '%(text)s' + RESET

CONFIG = {
    'DEBUG': True,
}

linter = Flake8()
linter.initialize(['myproject', '--format=' + FORMAT])
linter.run_checks()
linter.report()

create_app(CONFIG).run()