Add pre-commit hook with black and flake8(#153)

Author: RishabhJain2018

.flake8

@@ -0,0 +1,5 @@
+[flake8]
+ignore = E501, F403, C901, F601, W503
+max-line-length = 79
+max-complexity = 18
+select = B,C,E,F,W,T4,B9

.gitignore

@@ -103,3 +103,6 @@ env3/
 
 # pytest
 .pytest_cache/
+
+# Text Editors
+.vscode/

.pre-commit-config.yaml

@@ -0,0 +1,10 @@
+repos:
+-   repo: https://github.com/ambv/black
+    rev: stable
+    hooks:
+    - id: black
+      language_version: python3.7
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v1.2.3
+    hooks:
+    - id: flake8

pyproject.toml

@@ -0,0 +1,16 @@
+[tool.black]
+line-length = 79
+include = '\.pyi?$'
+exclude = '''
+/(
+    \.git
+  | \.hg
+  | \.mypy_cache
+  | \.tox
+  | \.venv
+  | _build
+  | buck-out
+  | build
+  | dist
+)/
+'''

requirements.txt

@@ -9,6 +9,7 @@ coveralls==1.3.0
 docker==3.6.0
 flake8==3.0.4
 lxml==4.2.1
+pre-commit==1.14.4
 pytest==3.5.1
 pytest-cov==2.5.1
 python-dateutil==2.7.3

setup.py

@@ -11,24 +11,25 @@
     long_description = f.read()
 
 install_requires = [
-    'beautifulsoup4==4.7.1',
-    'beautifultable==0.7.0',
-    'boto==2.49.0',
-    'boto3==1.9.88',
-    'botocore==1.12.116',
-    'click==6.7',
-    'coverage==4.5.1',
-    'coveralls==1.3.0',
-    'docker==3.6.0',
-    'flake8==3.0.4',
-    'lxml==4.2.1',
-    'pytest==3.5.1',
-    'pytest-cov==2.5.1',
-    'python-dateutil==2.7.3',
-    'requests==2.20.0',
-    'requests-toolbelt==0.8.0',
-    'responses==0.9.0',
-    'validators==0.12.2',
+    "beautifulsoup4==4.7.1",
+    "beautifultable==0.7.0",
+    "boto==2.49.0",
+    "boto3==1.9.88",
+    "botocore==1.12.116",
+    "click==6.7",
+    "coverage==4.5.1",
+    "coveralls==1.3.0",
+    "docker==3.6.0",
+    "flake8==3.0.4",
+    "lxml==4.2.1",
+    "pre-commit==1.14.4",
+    "pytest==3.5.1",
+    "pytest-cov==2.5.1",
+    "python-dateutil==2.7.3",
+    "requests==2.20.0",
+    "requests-toolbelt==0.8.0",
+    "responses==0.9.0",
+    "validators==0.12.2",
 ]
 
 setup(