Add mypy

Author: pritam001

Makefile

@@ -73,10 +73,13 @@ format: #: Format and fix python code with black, isort, autoflake
 	autoflake --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys --ignore-init-module-imports -i -r $(APP_DIR) $(TEST_DIR) $(HOME_DIR_PY_FILES)
 
 
-lint: #: Run static analysis with flake8, bandit and mypy
+lint: #: Run static analysis with flake8, mypy and bandit
 	@echo "$(BOLD_CYAN)Flake linting ❄️$(RESET_STYLES)"
 	flake8 --version
 	flake8 $(APP_DIR) $(TEST_DIR) $(HOME_DIR_PY_FILES)
+	@echo "$(BOLD_CYAN)Static typing️️$(RESET_STYLES)⌨️"
+	mypy --version
+	mypy $(APP_DIR) $(HOME_DIR_PY_FILES)
 	@echo "$(BOLD_CYAN)Securing with bandit️🕵️️$(RESET_STYLES)"
 	bandit --version
 	bandit -l -i -r . --format=custom

README.md

@@ -11,8 +11,9 @@ Tools
 ------------------------------------------------------------------------------
 [![Min Python Version 3.6+](https://img.shields.io/badge/python-3.6+-3776AB.svg)](https://www.python.org/download/releases/3.6.0/)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
-[![PEP8](https://img.shields.io/badge/code%20style-pep8-orange.svg)](https://www.python.org/dev/peps/pep-0008/)
-[![security: bandit](https://img.shields.io/badge/security-bandit-yellow.svg)](https://github.com/PyCQA/bandit)
+[![Static Analysis: flake8](https://img.shields.io/badge/static%20analysis-flake8-white.svg)](https://www.python.org/dev/peps/pep-0008/)
+[![Static Typing: mypy](https://img.shields.io/badge/static%20typing-mypy-blue.svg)](https://www.python.org/dev/peps/pep-0008/)
+[![Security: bandit](https://img.shields.io/badge/security-bandit-yellow.svg)](https://github.com/PyCQA/bandit)
 
 Development Status
 ------------------------------------------------------------------------------
@@ -40,4 +41,5 @@ Linting Guide
 ------------------------------------------------------------------------------
 `make format` : Format and fix python code with black, isort, autoflake
 
-`make lint` : Run static analysis with flake8, bandit and mypy
+`make lint` : Run static analysis with flake8, mypy and bandit
+

documentation/linting.md

@@ -1,5 +1,8 @@
+from typing import Dict
+
+
 class Singleton(type):
-    _instances = {}
+    _instances: Dict = {}
 
     def __call__(cls, *args, **kwargs):
         if cls not in cls._instances: