AirBnB clone - The console

Project in which the base of the AirBnB clone will be created as a study method.

All knowledge acquired in python will be implemented, its base structure will be:

• Create the basic classes where the most basic attributes will be saved, such as the time it was created and its respective ID.
• Create the basic methods that our interpreter will execute when we enter the commands corresponding to those methods.
• Verify each of the functions so that they execute with all possible cases to avoid errors. Each of these cases will be looked at later.

First step: Write a command interpreter to manage your AirBnB objects:

This is the first step towards building your first full web application: the AirBnB clone. This first step is very important because you will use what you build during this project with all other following projects: HTML/CSS templating, database storage, API, front-end integration…

Each task is linked and will help you to:

• put in place a parent class (called BaseModel) to take care of the initialization, serialization and deserialization of your future instances
• create a simple flow of serialization/deserialization: Instance <-> Dictionary <-> JSON string <-> file
• create all classes used for AirBnB (User, State, City, Place…) that inherit from BaseModel
• create the first abstracted storage engine of the project: File storage.
• create all unittests to validate all our classes and storage engine

What’s a command interpreter?

A command interpreter is the part of a computer operating system that understands and executes commands that are entered interactively by a human being or from a program. In some operating systems, the command interpreter is called the shell. But limited to a specific use-case. In our case, we want to be able to manage the objects of our project:

• Create a new object (ex: a new User or a new Place)
• Retrieve an object from a file, a database etc…
• Do operations on objects (count, compute stats, etc…)
• Update attributes of an object
• Destroy an object

Technologies:

In this project we used Python 3.4 and was verified with pep8 1.7

We import this modules to create the console:

• import cmd
• import sys
• import json
• import subprocess

Launch this Console:

How to run a project?

You only need to run console.py file with this command ./console.py

This command must be executed in the root folder of the project like:

vagrant@vagrant-ubuntu-trusty-64:~/home/user/Documents/AirBnB_clone$ ./console.py

make sure all files are in the root directory.

Examples of use:

First you need to run the console.py

Then you need to know the comands that the console can run:

• all: Prints all string representation of all instances based or not on the class name.

sintax: all <class name> or all

• create: Creates a new instance of BaseModel, saves it (to the JSON file) and prints the id.

sintax: create <class name>

• destroy: Deletes an instance based on the class name and id (save the change into the JSON file).

sintax: destroy <class name> <id>

• show: Prints the string representation of an instance based on the class name and id.

sintax: show <class name> <id>

• update: Updates an instance based on the class name and id by adding or updating attribute (save the change into the JSON file).

sintax: update <class name> <id> <attribute name> "<attribute value>" If you need more info type: (hbnb) ?or (hbnb) help.

Take from examples what you see in the follow image:

Inspiration:

Project provided by Holberton

By:

Cristian Gomez - Jonatan Mazo