Python project setup.

.flake8

ignore = W503
max-line-length = 79
max-complexity = 18
select = B,C,E,F,W,T4,B9

.isort.cfg

[settings]
multi_line_output=3
include_trailing_comma=True
force_grid_wrap=0
combine_as_imports=True
line_length=79

.pre-commit-config.yaml

default_language_version:
    python: python3.7
repos:
-   repo: https://github.com/ambv/black
    rev: stable
    hooks:
    - id: black
-   repo: https://github.com/pre-commit/mirrors-isort
    rev: master
    hooks:
    - id: isort
-   repo: https://github.com/pre-commit/pre-commit-hooks
    rev: master
    hooks:
    - id: flake8
    - id: requirements-txt-fixer
    - id: trailing-whitespace
-   repo: https://github.com/pre-commit/mirrors-mypy	
    rev: master	
    hooks:	
    -   id: mypy 

mypy.ini

[mypy]
# Specify the target platform details in config, so your developers are
# free to run mypy on Windows, Linux, or macOS and get consistent
# results.
python_version=3.7
platform=linux

# flake8-mypy expects the two following for sensible formatting
show_column_numbers=True

# show error messages from unrelated files
follow_imports=normal

# suppress errors about unsatisfied imports
ignore_missing_imports=True

# be strict
disallow_untyped_calls=True
warn_return_any=True
strict_optional=True
warn_no_return=True
warn_redundant_casts=True
warn_unused_ignores=True
warn_incomplete_stub=True
strict_equality=True
disallow_untyped_defs=True
check_untyped_defs=True

pyproject.toml

[tool.black]
line-length = 79
target-version=["py37"]
include = '\.pyi?$'
exclude = '''
/(
    \.git
  | \.hg
  | \.mypy_cache
  | \.tox
  | \.venv
  | _build
  | buck-out
  | build
  | dist
)/
'''