makes connection between Python front end and SQL backend database this project also has a nice front-end menu to interact with database easily. python functions definitions are used very frequently in this. this project gave me a lot clairity about functions and functions in functions and i f-else statement inside functions.
we type: def functionname(): fucntion defined with and indent all the things inside this indent is inside the function. to call the funvtion jist type: functionname() in python shell or in .py file
the core of front end in this project the function was first defined and the used at the last after defining the remaining functions. it is inicially called inside ducument but you can call any function any time eg. just erite menu() or add_seller() an the functions are called.