Add pre-commit hooks (#156)

* add pre-commit hooks

* update yapf version

.pre-commit-config.yaml

+repos:
+- repo: https://github.com/asottile/seed-isort-config
+  rev: v1.9.3
+  hooks:
+      - id: seed-isort-config
+# - repo: https://github.com/pre-commit/mirrors-isort
+#   rev: v4.3.21
+#   hooks:
+#       - id: isort
+- repo: https://github.com/pre-commit/mirrors-yapf
+  rev: v0.29.0
+  hooks:
+    - id: yapf
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v2.3.0
+  hooks:
+    - id: flake8
+    - id: trailing-whitespace
+    - id: check-yaml
+    - id: end-of-file-fixer
+    - id: requirements-txt-fixer

setup.cfg

@@ -15,8 +15,8 @@ split_before_expression_after_opening_paren = true
 [isort]
 line_length = 79
 multi_line_output = 0
-known_standard_library = setuptools
+known_standard_library = pkg_resources,setuptools
 known_first_party = mmcv
-known_third_party = addict,cv2,matplotlib,numpy,requests,six,torch,yaml
+known_third_party = Cython,addict,cv2,mock,numpy,pytest,requests,resnet_cifar,six,terminaltables,torch,torchvision,yaml
 no_lines_before = STDLIB,LOCALFOLDER
 default_section = THIRDPARTY