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 MQTT Introduction: It is message broker which holds the data when ever a consumer will connected to the topic then he will receive the data . mqtt is a machine to machine message broker, mainly used in IOT application, the default port is 1883   Installation: sudo apt-get update sudo apt-get install mosquitto Command line execution: Producer mosquitto_pub -h 127.0.0.1 -t 'topic_name' -m '{'name':'Sony'}' Subscriber mosquitto_sub -h 127.0.0.1 -t 'topic_name' -h : it is the host address -t : topic name -m : message payload QOS in MQTT: QOS(quality of services) there are mainly 3 services are available in mqtt  qos=0 qos=1 qos=2 QOS (0,0): At most once service, publisher will send a message to broker at most once, the broker passes a message to subscriber one time     

 Flask     A Micro framework , where everything is customized, if we want to use restful api's we can add flask-restful library, or we wanted to go by rest plus we can  use rest plus library   After writing the all api's we need something to test  the api's and it should contain all the required parameters like schema , for these things we can use swagger  project structure should be add service __init__.py below code for swagger load app = Flask(__name__ , instance_relative_config = True ) CORS(app) # swagger specific SWAGGER_URL = '/swagger' API_URL = '/static/swagger.yml' SWAGGERUI_BLUEPRINT = get_swaggerui_blueprint( SWAGGER_URL , API_URL , config ={ 'app_name' : "service Name" } ) add the blue print app.register_blueprint(SWGGER_BLUPRINT, url_prefix=SWAGGER_URL)   Start the service python app.py  on the default port 5000 it will load and endpoint /swagger 127.0.0.1:5000/swagger    

From every version to version upgrade there are certain changes they will for better performance and for better results Below are new things added in python3.7 : 1. Keywords :         Reserved words (also called keywords) are defined with predefined meaning and syntax in the language,  These keywords have to be used to develop programming instructions. These keywords can't be used as variables are function names or class names ..etc These 2 new keywords are added in python3.7  are async and await   . These will be used in asynchronous programming you can heard these keys in using of library asyncio or using the python framework aiohttp 2. Breakpoint :     Python breakpoint() is a new built-in function introduced in Python 3.7. Python code debugging has always been a painful process because of tight coupling between the actual code and the debugging module code Previously in python3.5 you need to import from sys modu...