Switch to flake8 for linting

Author: dmerejkowsky

.flake8

@@ -0,0 +1,7 @@
+[flake8]
+ignore =
+  E122,
+  E123,
+  E221,
+  E501,
+  E731

cli_ui/__init__.py

@@ -1,7 +1,3 @@
-from typing import IO, Any, Callable, Dict, List, Optional, Sequence, Tuple, Type, Union
-
-Dict, Type
-
 import argparse
 import datetime
 import difflib
@@ -13,6 +9,7 @@
 import sys
 import time
 import traceback
+from typing import IO, Any, Callable, Dict, List, Optional, Sequence, Tuple, Union
 
 import colorama
 import tabulate
@@ -40,6 +37,7 @@
 # and over again:
 _ENABLE_XTERM_TITLE = None
 
+
 colorama.init()
 
 
@@ -367,7 +365,7 @@ def debug(*tokens: Token, **kwargs: Any) -> None:
 
 def indent_iterable(elems: Sequence[str], num: int = 2) -> List[str]:
     """Indent an iterable."""
-    return [" " * num + l for l in elems]
+    return [" " * num + elem for elem in elems]
 
 
 def indent(text: str, num: int = 2) -> str:

lint.sh

@@ -4,5 +4,5 @@ set -e
 poetry run black --check .
 poetry run isort --check .
 poetry run mypy cli_ui
-poetry run pyflakes cli_ui/__init__.py cli_ui/tests/test_cli_ui.py
+poetry run flake8 cli_ui/__init__.py cli_ui/tests/test_cli_ui.py
 poetry run sphinx-build -W docs docs/_build/html

poetry.lock

@@ -23,7 +23,8 @@ ghp-import = "^0.5.5"
 # linters
 black = "19.10b0"
 mypy = "^0.800"
-pyflakes = "2.1.1"
+flake8 = "^3.9.1"
+pep8-naming = "^0.11.1"
 
 # tests
 attrs = "^19.3"