Add pre-commit and fix isort

.pre-commit-config.yaml

@@ -0,0 +1,36 @@
+repos:
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v1.24.0
+    hooks:
+      - id: pyupgrade
+
+  - repo: https://github.com/psf/black
+    rev: 19.3b0
+    hooks:
+      - id: black
+        language_version: python3.7
+        # override until resolved: https://github.com/psf/black/issues/402
+        files: \.pyi?$
+        types: []
+
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.7.8
+    hooks:
+      - id: flake8
+        additional_dependencies: [flake8-2020]
+
+  - repo: https://github.com/pre-commit/mirrors-isort
+    rev: v4.3.21
+    hooks:
+      - id: isort
+        language_version: python3.7
+
+  - repo: https://github.com/pre-commit/pygrep-hooks
+    rev: v1.4.1
+    hooks:
+      - id: python-check-blanket-noqa
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.3.0
+    hooks:
+      - id: check-yaml

.travis.yml

@@ -18,7 +18,6 @@ matrix:
       env: TOXENV=lint
     - python: 3.7
       env: TOXENV=py37
-      dist: xenial
     - python: 3.6
       env: TOXENV=py36
     - python: 3.5
@@ -27,7 +26,6 @@ matrix:
       env: TOXENV=pypy3
     - python: 3.8-dev
       env: TOXENV=py38dev
-      dist: xenial
   allow_failures:
     - env: TOXENV=pypy3
   fast_finish: true

tests/test_librefm.py

@@ -4,9 +4,8 @@ Integration (not unit) tests for pylast.py
 """
 import unittest
 
-from flaky import flaky
-
 import pylast
+from flaky import flaky
 
 from .test_pylast import PyLastTestCase, load_secrets
 

tests/test_pylast.py

@@ -7,12 +7,10 @@ import sys
 import time
 import unittest
 
+import pylast
 import pytest
 from flaky import flaky
 
-import pylast
-
-
 PY37 = sys.version_info[:2] == (3, 7)
 
 

tests/unicode_test.py

@@ -1,8 +1,7 @@
 # -*- coding: utf-8 -*-
 import mock
-import pytest
-
 import pylast
+import pytest
 
 
 def mock_network():

tox.ini

@@ -23,10 +23,6 @@ deps = ipdb
 commands = {posargs}
 
 [testenv:lint]
-deps =
-    flake8
-    pep8-naming
-    black
-commands =
-    flake8 .
-    black --check --diff .
+deps = pre-commit
+commands = pre-commit run --all-files
+skip_install = true