0x00. AirBnB clone - The console
- Author Details
- Requirements
- Project Description
- Commmand Interpreter Description and Execution
- How to Use it with Examples
- Tasks
- Known Bugs
- Collaborate
- Eyob Ketema - [email protected]
- Allowed editors:
vi
,vim
,emacs
. - All your files will be interpreted/compiled on Ubuntu 20.04 LTS using python3 (version 3.8.5).
- The first line of all your files should be exactly
#!/usr/bin/python3
. - Your code should use the pycodestyle (version
2.8.*
). - All your files must be executable.
- All your test files should be inside a folder
tests
. - All your test files should be text files (extension:
.txt
). - All your tests should be executed by using this command:
python3 -m doctest ./tests/*
. - The length of your files will be tested using
wc
. - All your modules should have a documentation (
python3 -c 'print(__import__("my_module").__doc__)'
). - All your classes should have a documentation (
python3 -c 'print(__import__("my_module").MyClass.__doc__)'
). - All your functions (inside and outside a class) should have a documentation (
python3 -c 'print(__import__("my_module").my_function.__doc__)
' andpython3 -c 'print(__import__("my_module").MyClass.my_function.__doc__)'
). - A documentation is not a simple word, it’s a real sentence explaining what’s the purpose of the module, class or method (the length of it will be verified).
Learn how to create a Python package.
How to create a command interpreter in Python using the cmd
module.
What is Unit testing and how to implement it in a large project.
How to serialize and deserialize a Class.
How to write and read a JSON file.
How to manage datetime
.
What is an UUID
.
What is *args
and how to use it.
What is **kwargs
and how to use it.
How to handle named arguments in a function.
Start the command interpreter as shown below:
$ ./console.py
(hbnb) help
Documented commands (type help <topic>):
========================================
EOF help quit
(hbnb)
(hbnb)
(hbnb) quit
$
But also it can be started like this in non-interactive mode: (like the Shell project in C):
$ echo "help" | ./console.py
(hbnb)
Documented commands (type help <topic>):
========================================
EOF help quit
(hbnb)
$
$ cat test_help
help
$
$ cat test_help | ./console.py
(hbnb)
Documented commands (type help <topic>):
========================================
EOF help quit
(hbnb)
guillaume@ubuntu:~/AirBnB$ ./console.py
(hbnb) all MyModel
** class doesn't exist **
(hbnb) show BaseModel
** instance id missing **
(hbnb) show BaseModel My_First_Model
** no instance found **
(hbnb) create BaseModel
49faff9a-6318-451f-87b6-910505c55907
(hbnb) all BaseModel
["[BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'id': '49faff9a-6318-451f-87b6-910505c55907', 'updated_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903300)}"]
(hbnb) show BaseModel 49faff9a-6318-451f-87b6-910505c55907
[BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'id': '49faff9a-6318-451f-87b6-910505c55907', 'updated_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903300)}
(hbnb) destroy
** class name missing **
(hbnb) update BaseModel 49faff9a-6318-451f-87b6-910505c55907 first_name "Betty"
(hbnb) show BaseModel 49faff9a-6318-451f-87b6-910505c55907
[BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'first_name': 'Betty', 'id': '49faff9a-6318-451f-87b6-910505c55907', 'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'updated_at': datetime.datetime(2017, 10, 2, 3, 11, 3, 49401)}
(hbnb) create BaseModel
2dd6ef5c-467c-4f82-9521-a772ea7d84e9
(hbnb) all BaseModel
["[BaseModel] (2dd6ef5c-467c-4f82-9521-a772ea7d84e9) {'id': '2dd6ef5c-467c-4f82-9521-a772ea7d84e9', 'created_at': datetime.datetime(2017, 10, 2, 3, 11, 23, 639717), 'updated_at': datetime.datetime(2017, 10, 2, 3, 11, 23, 639724)}", "[BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'first_name': 'Betty', 'id': '49faff9a-6318-451f-87b6-910505c55907', 'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'updated_at': datetime.datetime(2017, 10, 2, 3, 11, 3, 49401)}"]
(hbnb) destroy BaseModel 49faff9a-6318-451f-87b6-910505c55907
(hbnb) show BaseModel 49faff9a-6318-451f-87b6-910505c55907
** no instance found **
(hbnb)
guillaume@ubuntu:~/AirBnB$ ./console.py
(hbnb) User.all()
[[User] (246c227a-d5c1-403d-9bc7-6a47bb9f0f68) {'first_name': 'Betty', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611352), 'updated_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611363), 'password': '63a9f0ea7bb98050796b649e85481845', 'email': '[email protected]', 'id': '246c227a-d5c1-403d-9bc7-6a47bb9f0f68'}, [User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'first_name': 'Betty', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848291), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': '[email protected]', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}]
(hbnb)
All your files, classes, functions must be tested with unit tests.
guillaume@ubuntu:~/AirBnB$ python3 -m unittest discover tests
...................................................................................
...................................................................................
.......................
----------------------------------------------------------------------
Ran 189 tests in 13.135s
OK
guillaume@ubuntu:~/AirBnB$
Unit tests must also pass in non-interactive mode:
guillaume@ubuntu:~/AirBnB$ echo "python3 -m unittest discover tests" | bash
...................................................................................
...................................................................................
.......................
----------------------------------------------------------------------
Ran 189 tests in 13.135s
OK
guillaume@ubuntu:~/AirBnB$
Write a class BaseModel that defines all common attributes/methods for other classes:
models/base_model.py
.- Public instance attributes:
id
: string - assign with anuuid
when an instance is created:- you can use
uuid.uuid4()
to generate uniqueid
but don’t forget to convert to a string. - the goal is to have unique
id
for eachBaseModel
.
- you can use
created_at
: datetime - assign with the current datetime when an instance is created.updated_at
: datetime - assign with the current datetime when an instance is created and it will be updated every time you change your object.
__str__
: should print:[<class name>] (<self.id>) <self.__dict__>
.- Public instance methods:
save(self)
: updates the public instance attributeupdated_at
with the current datetime.to_dict(self)
: returns a dictionary containing all keys/values of__dict__
of the instance:- by using
self.__dict__
, only instance attributes set will be returned. - a key
__class__
must be added to this dictionary with the class name of the object. created_at
andupdated_at
must be converted to string object in ISO format:- format:
%Y-%m-%dT%H:%M:%S.%f
(ex:2017-06-14T22:31:03.285259
). - you can use
isoformat()
ofdatetime
object.
- format:
- This method will be the first piece of the serialization/deserialization process: create a dictionary representation with “simple object type” of our
BaseModel
.
- by using
guillaume@ubuntu:~/AirBnB$ cat test_base_model.py
#!/usr/bin/python3
from models.base_model import BaseModel
my_model = BaseModel()
my_model.name = "My First Model"
my_model.my_number = 89
print(my_model)
my_model.save()
print(my_model)
my_model_json = my_model.to_dict()
print(my_model_json)
print("JSON of my_model:")
for key in my_model_json.keys():
print("\t{}: ({}) - {}".format(key, type(my_model_json[key]), my_model_json[key]))
guillaume@ubuntu:~/AirBnB$ ./test_base_model.py
[BaseModel] (b6a6e15c-c67d-4312-9a75-9d084935e579) {'my_number': 89, 'name': 'My First Model', 'updated_at': datetime.datetime(2017, 9, 28, 21, 5, 54, 119434), 'id': 'b6a6e15c-c67d-4312-9a75-9d084935e579', 'created_at': datetime.datetime(2017, 9, 28, 21, 5, 54, 119427)}
[BaseModel] (b6a6e15c-c67d-4312-9a75-9d084935e579) {'my_number': 89, 'name': 'My First Model', 'updated_at': datetime.datetime(2017, 9, 28, 21, 5, 54, 119572), 'id': 'b6a6e15c-c67d-4312-9a75-9d084935e579', 'created_at': datetime.datetime(2017, 9, 28, 21, 5, 54, 119427)}
{'my_number': 89, 'name': 'My First Model', '__class__': 'BaseModel', 'updated_at': '2017-09-28T21:05:54.119572', 'id': 'b6a6e15c-c67d-4312-9a75-9d084935e579', 'created_at': '2017-09-28T21:05:54.119427'}
JSON of my_model:
my_number: (<class 'int'>) - 89
name: (<class 'str'>) - My First Model
__class__: (<class 'str'>) - BaseModel
updated_at: (<class 'str'>) - 2017-09-28T21:05:54.119572
id: (<class 'str'>) - b6a6e15c-c67d-4312-9a75-9d084935e579
created_at: (<class 'str'>) - 2017-09-28T21:05:54.119427
guillaume@ubuntu:~/AirBnB$
Previously we created a method to generate a dictionary representation of an instance (method to_dict()
).
Now it’s time to re-create an instance with this dictionary representation:
<class 'BaseModel'> -> to_dict() -> <class 'dict'> -> <class 'BaseModel'>
Update models/base_model.py
:
__init__(self, *args, **kwargs)
:- you will use
*args, **kwargs
arguments for the constructor of aBaseModel
. (more information inside the AirBnB clone concept page). *args
won’t be used.- if
kwargs
is not empty:- each key of this dictionary is an attribute name (Note
__class__
fromkwargs
is the only one that should not be added as an attribute. See the example output, below). - each value of this dictionary is the value of this attribute name.
- Warning:
created_at
andupdated_at
are strings in this dictionary, but inside yourBaseModel
instance is working withdatetime
object. You have to convert these strings intodatetime
object. Tip: you know the string format of these datetime.
- each key of this dictionary is an attribute name (Note
- otherwise:
- create
id
andcreated_at
as you did previously (new instance).
- create
- you will use
guillaume@ubuntu:~/AirBnB$ cat test_base_model_dict.py
#!/usr/bin/python3
from models.base_model import BaseModel
my_model = BaseModel()
my_model.name = "My_First_Model"
my_model.my_number = 89
print(my_model.id)
print(my_model)
print(type(my_model.created_at))
print("--")
my_model_json = my_model.to_dict()
print(my_model_json)
print("JSON of my_model:")
for key in my_model_json.keys():
print("\t{}: ({}) - {}".format(key, type(my_model_json[key]), my_model_json[key]))
print("--")
my_new_model = BaseModel(**my_model_json)
print(my_new_model.id)
print(my_new_model)
print(type(my_new_model.created_at))
print("--")
print(my_model is my_new_model)
guillaume@ubuntu:~/AirBnB$ ./test_base_model_dict.py
56d43177-cc5f-4d6c-a0c1-e167f8c27337
[BaseModel] (56d43177-cc5f-4d6c-a0c1-e167f8c27337) {'id': '56d43177-cc5f-4d6c-a0c1-e167f8c27337', 'created_at': datetime.datetime(2017, 9, 28, 21, 3, 54, 52298), 'my_number': 89, 'updated_at': datetime.datetime(2017, 9, 28, 21, 3, 54, 52302), 'name': 'My_First_Model'}
<class 'datetime.datetime'>
--
{'id': '56d43177-cc5f-4d6c-a0c1-e167f8c27337', 'created_at': '2017-09-28T21:03:54.052298', '__class__': 'BaseModel', 'my_number': 89, 'updated_at': '2017-09-28T21:03:54.052302', 'name': 'My_First_Model'}
JSON of my_model:
id: (<class 'str'>) - 56d43177-cc5f-4d6c-a0c1-e167f8c27337
created_at: (<class 'str'>) - 2017-09-28T21:03:54.052298
__class__: (<class 'str'>) - BaseModel
my_number: (<class 'int'>) - 89
updated_at: (<class 'str'>) - 2017-09-28T21:03:54.052302
name: (<class 'str'>) - My_First_Model
--
56d43177-cc5f-4d6c-a0c1-e167f8c27337
[BaseModel] (56d43177-cc5f-4d6c-a0c1-e167f8c27337) {'id': '56d43177-cc5f-4d6c-a0c1-e167f8c27337', 'created_at': datetime.datetime(2017, 9, 28, 21, 3, 54, 52298), 'my_number': 89, 'updated_at': datetime.datetime(2017, 9, 28, 21, 3, 54, 52302), 'name': 'My_First_Model'}
<class 'datetime.datetime'>
--
False
guillaume@ubuntu:~/AirBnB$
Now we can recreate a BaseModel
from another one by using a dictionary representation:
<class 'BaseModel'> -> to_dict() -> <class 'dict'> -> <class 'BaseModel'>
It’s great but it’s still not persistent: every time you launch the program, you don’t restore all objects created before… The first way you will see here is to save these objects to a file.
Writing the dictionary representation to a file won’t be relevant:
- Python doesn’t know how to convert a string to a dictionary (easily).
- It’s not human readable.
- Using this file with another program in Python or other language will be hard.
So, you will convert the dictionary representation to a JSON string. JSON is a standard representation of a data structure. With this format, humans can read and all programming languages have a JSON reader and writer.
Now the flow of serialization-deserialization will be:
<class 'BaseModel'> -> to_dict() -> <class 'dict'> -> JSON dump -> <class 'str'> -> FILE -> <class 'str'> -> JSON load -> <class 'dict'> -> <class 'BaseModel'>
Write a class FileStorage
that serializes instances to a JSON file and deserializes JSON file to instances:
models/engine/file_storage.py
.- Private class attributes:
__file_path
: string - path to the JSON file (ex:file.json
).__objects
: dictionary - empty but will store all objects by<class name>.id
(ex: to store aBaseModel
object withid=12121212
, the key will beBaseModel.12121212
).
- Public instance methods:
all(self)
: returns the dictionary__objects
.new(self, obj)
: sets in__objects
theobj
with key<obj class name>.id
.save(self)
: serializes__objects
to the JSON file (path:__file_path
).reload(self)
: deserializes the JSON file to__objects
(only if the JSON file (__file_path
) exists ; otherwise, do nothing. If the file doesn’t exist, no exception should be raised).
Update models/__init__.py
: to create a unique FileStorage
instance for your application:
- import
file_storage.py
. - create the variable
storage
, an instance ofFileStorage
. - call
reload()
method on this variable.
Update models/base_model.py
: to link your BaseModel
to FileStorage
by using the variable storage
.
- import the variable storage.
- in the method
save(self)
:- call
save(self)
method ofstorage
.
- call
__init__(self, *args, **kwargs)
:- if it’s a new instance (not from a dictionary representation), add a call to the method
new(self)
onstorage
.
- if it’s a new instance (not from a dictionary representation), add a call to the method
guillaume@ubuntu:~/AirBnB$ cat test_save_reload_base_model.py
#!/usr/bin/python3
from models import storage
from models.base_model import BaseModel
all_objs = storage.all()
print("-- Reloaded objects --")
for obj_id in all_objs.keys():
obj = all_objs[obj_id]
print(obj)
print("-- Create a new object --")
my_model = BaseModel()
my_model.name = "My_First_Model"
my_model.my_number = 89
my_model.save()
print(my_model)
guillaume@ubuntu:~/AirBnB$ cat file.json
cat: file.json: No such file or directory
guillaume@ubuntu:~/AirBnB$
guillaume@ubuntu:~/AirBnB$ ./test_save_reload_base_model.py
-- Reloaded objects --
-- Create a new object --
[BaseModel] (ee49c413-023a-4b49-bd28-f2936c95460d) {'my_number': 89, 'updated_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47381), 'created_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47372), 'name': 'My_First_Model', 'id': 'ee49c413-023a-4b49-bd28-f2936c95460d'}
guillaume@ubuntu:~/AirBnB$
guillaume@ubuntu:~/AirBnB$ cat file.json ; echo ""
{"BaseModel.ee49c413-023a-4b49-bd28-f2936c95460d": {"my_number": 89, "__class__": "BaseModel", "updated_at": "2017-09-28T21:07:25.047381", "created_at": "2017-09-28T21:07:25.047372", "name": "My_First_Model", "id": "ee49c413-023a-4b49-bd28-f2936c95460d"}}
guillaume@ubuntu:~/AirBnB$
guillaume@ubuntu:~/AirBnB$ ./test_save_reload_base_model.py
-- Reloaded objects --
[BaseModel] (ee49c413-023a-4b49-bd28-f2936c95460d) {'name': 'My_First_Model', 'id': 'ee49c413-023a-4b49-bd28-f2936c95460d', 'updated_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47381), 'my_number': 89, 'created_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47372)}
-- Create a new object --
[BaseModel] (080cce84-c574-4230-b82a-9acb74ad5e8c) {'name': 'My_First_Model', 'id': '080cce84-c574-4230-b82a-9acb74ad5e8c', 'updated_at': datetime.datetime(2017, 9, 28, 21, 7, 51, 973308), 'my_number': 89, 'created_at': datetime.datetime(2017, 9, 28, 21, 7, 51, 973301)}
guillaume@ubuntu:~/AirBnB$
guillaume@ubuntu:~/AirBnB$ ./test_save_reload_base_model.py
-- Reloaded objects --
[BaseModel] (080cce84-c574-4230-b82a-9acb74ad5e8c) {'id': '080cce84-c574-4230-b82a-9acb74ad5e8c', 'updated_at': datetime.datetime(2017, 9, 28, 21, 7, 51, 973308), 'created_at': datetime.datetime(2017, 9, 28, 21, 7, 51, 973301), 'name': 'My_First_Model', 'my_number': 89}
[BaseModel] (ee49c413-023a-4b49-bd28-f2936c95460d) {'id': 'ee49c413-023a-4b49-bd28-f2936c95460d', 'updated_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47381), 'created_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47372), 'name': 'My_First_Model', 'my_number': 89}
-- Create a new object --
[BaseModel] (e79e744a-55d4-45a3-b74a-ca5fae74e0e2) {'id': 'e79e744a-55d4-45a3-b74a-ca5fae74e0e2', 'updated_at': datetime.datetime(2017, 9, 28, 21, 8, 6, 151750), 'created_at': datetime.datetime(2017, 9, 28, 21, 8, 6, 151711), 'name': 'My_First_Model', 'my_number': 89}
guillaume@ubuntu:~/AirBnB$
guillaume@ubuntu:~/AirBnB$ cat file.json ; echo ""
{"BaseModel.e79e744a-55d4-45a3-b74a-ca5fae74e0e2": {"__class__": "BaseModel", "id": "e79e744a-55d4-45a3-b74a-ca5fae74e0e2", "updated_at": "2017-09-28T21:08:06.151750", "created_at": "2017-09-28T21:08:06.151711", "name": "My_First_Model", "my_number": 89}, "BaseModel.080cce84-c574-4230-b82a-9acb74ad5e8c": {"__class__": "BaseModel", "id": "080cce84-c574-4230-b82a-9acb74ad5e8c", "updated_at": "2017-09-28T21:07:51.973308", "created_at": "2017-09-28T21:07:51.973301", "name": "My_First_Model", "my_number": 89}, "BaseModel.ee49c413-023a-4b49-bd28-f2936c95460d": {"__class__": "BaseModel", "id": "ee49c413-023a-4b49-bd28-f2936c95460d", "updated_at": "2017-09-28T21:07:25.047381", "created_at": "2017-09-28T21:07:25.047372", "name": "My_First_Model", "my_number": 89}}
guillaume@ubuntu:~/AirBnB$
Write a program called console.py
that contains the entry point of the command interpreter:
- You must use the module
cmd
. - Your class definition must be:
class HBNBCommand(cmd.Cmd):
. - Your command interpreter should implement:
quit
andEOF
to exit the program.help
(this action is provided by default bycmd
but you should keep it updated and documented as you work through tasks).- a custom prompt:
(hbnb)
. - an empty line +
ENTER
shouldn’t execute anything.
- Your code should not be executed when imported.
Warning:
You should end your file with:
if __name__ == '__main__':
HBNBCommand().cmdloop()
to make your program executable except when imported. Please don’t add anything around - the Checker won’t like it otherwise.
guillaume@ubuntu:~/AirBnB$ ./console.py
(hbnb) help
Documented commands (type help <topic>):
========================================
EOF help quit
(hbnb)
(hbnb) help quit
Quit command to exit the program
(hbnb)
(hbnb)
(hbnb) quit
guillaume@ubuntu:~/AirBnB$
Update your command interpreter (console.py
) to have these commands:
create
: Creates a new instance ofBaseModel
, saves it (to the JSON file) and prints theid
. Ex:$ create BaseModel
.- If the class name is missing, print
** class name missing **
(ex:$ create
). - If the class name doesn’t exist, print
** class doesn't exist **
(ex:$ create MyModel
).
- If the class name is missing, print
show
: Prints the string representation of an instance based on the class name andid
. Ex:$ show BaseModel 1234-1234-1234
.- If the class name is missing, print
** class name missing **
(ex:$ show
). - If the class name doesn’t exist, print
** class doesn't exist **
(ex:$ show MyModel
). - If the
id
is missing, print** instance id missing **
(ex:$ show BaseModel
). - If the instance of the class name doesn’t exist for the
id
, print** no instance found **
(ex:$ show BaseModel 121212
).
- If the class name is missing, print
destroy
: Deletes an instance based on the class name andid
(save the change into the JSON file). Ex:$ destroy BaseModel 1234-1234-1234
.- If the class name is missing, print
** class name missing **
(ex:$ destroy
). - If the class name doesn’t exist, print
** class doesn't exist **
(ex:$ destroy MyModel
). - If the
id
is missing, print** instance id missing **
(ex:$ destroy BaseModel
). - If the instance of the class name doesn’t exist for the
id
, print** no instance found **
(ex:$ destroy BaseModel 121212
).
- If the class name is missing, print
all
: Prints all string representation of all instances based or not on the class name. Ex:$ all BaseModel
or$ all
.- The printed result must be a list of strings (like the example below).
- If the class name doesn’t exist, print
** class doesn't exist **
(ex: $all MyModel
).
update
: Updates an instance based on the class name andid
by adding or updating attribute (save the change into the JSON file). Ex:$ update BaseModel 1234-1234-1234 email "[email protected]"
.- Usage:
update <class name> <id> <attribute name> "<attribute value>"
. - Only one attribute can be updated at the time.
- You can assume the attribute name is valid (exists for this model).
- The attribute value must be casted to the attribute type.
- If the class name is missing, print
** class name missing **
(ex:$ update
). - If the class name doesn’t exist, print
** class doesn't exist **
(ex:$ update MyModel
). - If the
id
is missing, print** instance id missing **
(ex:$ update BaseModel
). - If the instance of the class name doesn’t exist for the
id
, print** no instance found **
(ex:$ update BaseModel 121212)
. - If the attribute name is missing, print
** attribute name missing **
(ex:$ update BaseModel existing-id
). - If the value for the attribute name doesn’t exist, print
** value missing **
(ex:$ update BaseModel existing-id first_name
). - All other arguments should not be used (Ex:
$ update BaseModel 1234-1234-1234 email "[email protected]" first_name "Betty"
=$ update BaseModel 1234-1234-1234 email "[email protected]"
). id
,created_at
andupdated_at
cant’ be updated. You can assume they won’t be passed in the update command.- Only “simple” arguments can be updated: string, integer and float. You can assume nobody will try to update list of ids or datetime.
- Usage:
Let’s add some rules:
- You can assume arguments are always in the right order.
- Each arguments are separated by a space.
- A string argument with a space must be between double quote.
- The error management starts from the first argument to the last one.
guillaume@ubuntu:~/AirBnB$ ./console.py
(hbnb) all MyModel
** class doesn't exist **
(hbnb) show BaseModel
** instance id missing **
(hbnb) show BaseModel My_First_Model
** no instance found **
(hbnb) create BaseModel
49faff9a-6318-451f-87b6-910505c55907
(hbnb) all BaseModel
["[BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'id': '49faff9a-6318-451f-87b6-910505c55907', 'updated_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903300)}"]
(hbnb) show BaseModel 49faff9a-6318-451f-87b6-910505c55907
[BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'id': '49faff9a-6318-451f-87b6-910505c55907', 'updated_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903300)}
(hbnb) destroy
** class name missing **
(hbnb) update BaseModel 49faff9a-6318-451f-87b6-910505c55907 first_name "Betty"
(hbnb) show BaseModel 49faff9a-6318-451f-87b6-910505c55907
[BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'first_name': 'Betty', 'id': '49faff9a-6318-451f-87b6-910505c55907', 'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'updated_at': datetime.datetime(2017, 10, 2, 3, 11, 3, 49401)}
(hbnb) create BaseModel
2dd6ef5c-467c-4f82-9521-a772ea7d84e9
(hbnb) all BaseModel
["[BaseModel] (2dd6ef5c-467c-4f82-9521-a772ea7d84e9) {'id': '2dd6ef5c-467c-4f82-9521-a772ea7d84e9', 'created_at': datetime.datetime(2017, 10, 2, 3, 11, 23, 639717), 'updated_at': datetime.datetime(2017, 10, 2, 3, 11, 23, 639724)}", "[BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'first_name': 'Betty', 'id': '49faff9a-6318-451f-87b6-910505c55907', 'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'updated_at': datetime.datetime(2017, 10, 2, 3, 11, 3, 49401)}"]
(hbnb) destroy BaseModel 49faff9a-6318-451f-87b6-910505c55907
(hbnb) show BaseModel 49faff9a-6318-451f-87b6-910505c55907
** no instance found **
(hbnb)
Write a class User
that inherits from BaseModel
:
models/user.py
.- Public class attributes:
email
: string - empty string.password
: string - empty string.first_name
: string - empty string.last_name
: string - empty string.
Update FileStorage
to manage correctly serialization and deserialization of User
.
Update your command interpreter (console.py
) to allow show
, create
, destroy
, update
and all
used with User.
guillaume@ubuntu:~/AirBnB$ cat test_save_reload_user.py
#!/usr/bin/python3
from models import storage
from models.base_model import BaseModel
from models.user import User
all_objs = storage.all()
print("-- Reloaded objects --")
for obj_id in all_objs.keys():
obj = all_objs[obj_id]
print(obj)
print("-- Create a new User --")
my_user = User()
my_user.first_name = "Betty"
my_user.last_name = "Bar"
my_user.email = "[email protected]"
my_user.password = "root"
my_user.save()
print(my_user)
print("-- Create a new User 2 --")
my_user2 = User()
my_user2.first_name = "John"
my_user2.email = "[email protected]"
my_user2.password = "root"
my_user2.save()
print(my_user2)
guillaume@ubuntu:~/AirBnB$ cat file.json ; echo ""
{"BaseModel.2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4": {"__class__": "BaseModel", "id": "2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4", "updated_at": "2017-09-28T21:11:14.333862", "created_at": "2017-09-28T21:11:14.333852"}, "BaseModel.a42ee380-c959-450e-ad29-c840a898cfce": {"__class__": "BaseModel", "id": "a42ee380-c959-450e-ad29-c840a898cfce", "updated_at": "2017-09-28T21:11:15.504296", "created_at": "2017-09-28T21:11:15.504287"}, "BaseModel.af9b4cbd-2ce1-4e6e-8259-f578097dd15f": {"__class__": "BaseModel", "id": "af9b4cbd-2ce1-4e6e-8259-f578097dd15f", "updated_at": "2017-09-28T21:11:12.971544", "created_at": "2017-09-28T21:11:12.971521"}, "BaseModel.38a22b25-ae9c-4fa9-9f94-59b3eb51bfba": {"__class__": "BaseModel", "id": "38a22b25-ae9c-4fa9-9f94-59b3eb51bfba", "updated_at": "2017-09-28T21:11:13.753347", "created_at": "2017-09-28T21:11:13.753337"}, "BaseModel.9bf17966-b092-4996-bd33-26a5353cccb4": {"__class__": "BaseModel", "id": "9bf17966-b092-4996-bd33-26a5353cccb4", "updated_at": "2017-09-28T21:11:14.963058", "created_at": "2017-09-28T21:11:14.963049"}}
guillaume@ubuntu:~/AirBnB$
guillaume@ubuntu:~/AirBnB$ ./test_save_reload_user.py
-- Reloaded objects --
[BaseModel] (38a22b25-ae9c-4fa9-9f94-59b3eb51bfba) {'id': '38a22b25-ae9c-4fa9-9f94-59b3eb51bfba', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 13, 753337), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 13, 753347)}
[BaseModel] (9bf17966-b092-4996-bd33-26a5353cccb4) {'id': '9bf17966-b092-4996-bd33-26a5353cccb4', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 963049), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 963058)}
[BaseModel] (2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4) {'id': '2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 333852), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 333862)}
[BaseModel] (a42ee380-c959-450e-ad29-c840a898cfce) {'id': 'a42ee380-c959-450e-ad29-c840a898cfce', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 15, 504287), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 15, 504296)}
[BaseModel] (af9b4cbd-2ce1-4e6e-8259-f578097dd15f) {'id': 'af9b4cbd-2ce1-4e6e-8259-f578097dd15f', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 12, 971521), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 12, 971544)}
-- Create a new User --
[User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'id': '38f22813-2753-4d42-b37c-57a17f1e4f88', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848291), 'email': '[email protected]', 'first_name': 'Betty', 'last_name': 'Bar', 'password': 'root'}
-- Create a new User 2 --
[User] (d0ef8146-4664-4de5-8e89-096d667b728e) {'id': 'd0ef8146-4664-4de5-8e89-096d667b728e', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848280), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848294), 'email': '[email protected]', 'first_name': 'John', 'password': 'root'}
guillaume@ubuntu:~/AirBnB$
guillaume@ubuntu:~/AirBnB$ cat file.json ; echo ""
{"BaseModel.af9b4cbd-2ce1-4e6e-8259-f578097dd15f": {"id": "af9b4cbd-2ce1-4e6e-8259-f578097dd15f", "updated_at": "2017-09-28T21:11:12.971544", "created_at": "2017-09-28T21:11:12.971521", "__class__": "BaseModel"}, "BaseModel.38a22b25-ae9c-4fa9-9f94-59b3eb51bfba": {"id": "38a22b25-ae9c-4fa9-9f94-59b3eb51bfba", "updated_at": "2017-09-28T21:11:13.753347", "created_at": "2017-09-28T21:11:13.753337", "__class__": "BaseModel"}, "BaseModel.9bf17966-b092-4996-bd33-26a5353cccb4": {"id": "9bf17966-b092-4996-bd33-26a5353cccb4", "updated_at": "2017-09-28T21:11:14.963058", "created_at": "2017-09-28T21:11:14.963049", "__class__": "BaseModel"}, "BaseModel.2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4": {"id": "2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4", "updated_at": "2017-09-28T21:11:14.333862", "created_at": "2017-09-28T21:11:14.333852", "__class__": "BaseModel"}, "BaseModel.a42ee380-c959-450e-ad29-c840a898cfce": {"id": "a42ee380-c959-450e-ad29-c840a898cfce", "updated_at": "2017-09-28T21:11:15.504296", "created_at": "2017-09-28T21:11:15.504287", "__class__": "BaseModel"}, "User.38f22813-2753-4d42-b37c-57a17f1e4f88": {"id": "38f22813-2753-4d42-b37c-57a17f1e4f88", "created_at": "2017-09-28T21:11:42.848279", "updated_at": "2017-09-28T21:11:42.848291", "email": "[email protected]", "first_name": "Betty", "__class__": "User", "last_name": "Bar", "password": "root"}, "User.d0ef8146-4664-4de5-8e89-096d667b728e": {"id": "d0ef8146-4664-4de5-8e89-096d667b728e", "created_at": "2017-09-28T21:11:42.848280", "updated_at": "2017-09-28T21:11:42.848294", "email": "[email protected]", "first_name": "John", "__class__": "User", "password": "root"}}
guillaume@ubuntu:~/AirBnB$
guillaume@ubuntu:~/AirBnB$ ./test_save_reload_user.py
-- Reloaded objects --
[BaseModel] (af9b4cbd-2ce1-4e6e-8259-f578097dd15f) {'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 12, 971544), 'id': 'af9b4cbd-2ce1-4e6e-8259-f578097dd15f', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 12, 971521)}
[BaseModel] (2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4) {'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 333862), 'id': '2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 333852)}
[BaseModel] (9bf17966-b092-4996-bd33-26a5353cccb4) {'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 963058), 'id': '9bf17966-b092-4996-bd33-26a5353cccb4', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 963049)}
[BaseModel] (a42ee380-c959-450e-ad29-c840a898cfce) {'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 15, 504296), 'id': 'a42ee380-c959-450e-ad29-c840a898cfce', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 15, 504287)}
[BaseModel] (38a22b25-ae9c-4fa9-9f94-59b3eb51bfba) {'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 13, 753347), 'id': '38a22b25-ae9c-4fa9-9f94-59b3eb51bfba', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 13, 753337)}
[User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'password': '63a9f0ea7bb98050796b649e85481845', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'email': '[email protected]', 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848291), 'last_name': 'Bar', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88', 'first_name': 'Betty'}
[User] (d0ef8146-4664-4de5-8e89-096d667b728e) {'password': '63a9f0ea7bb98050796b649e85481845', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848280), 'email': '[email protected]', 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848294), 'id': 'd0ef8146-4664-4de5-8e89-096d667b728e', 'first_name': 'John'}
-- Create a new User --
[User] (246c227a-d5c1-403d-9bc7-6a47bb9f0f68) {'password': 'root', 'created_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611352), 'email': '[email protected]', 'updated_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611363), 'last_name': 'Bar', 'id': '246c227a-d5c1-403d-9bc7-6a47bb9f0f68', 'first_name': 'Betty'}
-- Create a new User 2 --
[User] (fce12f8a-fdb6-439a-afe8-2881754de71c) {'password': 'root', 'created_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611354), 'email': '[email protected]', 'updated_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611368), 'id': 'fce12f8a-fdb6-439a-afe8-2881754de71c', 'first_name': 'John'}
guillaume@ubuntu:~/AirBnB$
guillaume@ubuntu:~/AirBnB$ cat file.json ; echo ""
{"BaseModel.af9b4cbd-2ce1-4e6e-8259-f578097dd15f": {"updated_at": "2017-09-28T21:11:12.971544", "__class__": "BaseModel", "id": "af9b4cbd-2ce1-4e6e-8259-f578097dd15f", "created_at": "2017-09-28T21:11:12.971521"}, "User.38f22813-2753-4d42-b37c-57a17f1e4f88": {"password": "63a9f0ea7bb98050796b649e85481845", "created_at": "2017-09-28T21:11:42.848279", "email": "[email protected]", "id": "38f22813-2753-4d42-b37c-57a17f1e4f88", "last_name": "Bar", "updated_at": "2017-09-28T21:11:42.848291", "first_name": "Betty", "__class__": "User"}, "User.d0ef8146-4664-4de5-8e89-096d667b728e": {"password": "63a9f0ea7bb98050796b649e85481845", "created_at": "2017-09-28T21:11:42.848280", "email": "[email protected]", "id": "d0ef8146-4664-4de5-8e89-096d667b728e", "updated_at": "2017-09-28T21:11:42.848294", "first_name": "John", "__class__": "User"}, "BaseModel.9bf17966-b092-4996-bd33-26a5353cccb4": {"updated_at": "2017-09-28T21:11:14.963058", "__class__": "BaseModel", "id": "9bf17966-b092-4996-bd33-26a5353cccb4", "created_at": "2017-09-28T21:11:14.963049"}, "BaseModel.a42ee380-c959-450e-ad29-c840a898cfce": {"updated_at": "2017-09-28T21:11:15.504296", "__class__": "BaseModel", "id": "a42ee380-c959-450e-ad29-c840a898cfce", "created_at": "2017-09-28T21:11:15.504287"}, "BaseModel.38a22b25-ae9c-4fa9-9f94-59b3eb51bfba": {"updated_at": "2017-09-28T21:11:13.753347", "__class__": "BaseModel", "id": "38a22b25-ae9c-4fa9-9f94-59b3eb51bfba", "created_at": "2017-09-28T21:11:13.753337"}, "BaseModel.2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4": {"updated_at": "2017-09-28T21:11:14.333862", "__class__": "BaseModel", "id": "2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4", "created_at": "2017-09-28T21:11:14.333852"}, "User.246c227a-d5c1-403d-9bc7-6a47bb9f0f68": {"password": "root", "created_at": "2017-09-28T21:12:19.611352", "email": "[email protected]", "id": "246c227a-d5c1-403d-9bc7-6a47bb9f0f68", "last_name": "Bar", "updated_at": "2017-09-28T21:12:19.611363", "first_name": "Betty", "__class__": "User"}, "User.fce12f8a-fdb6-439a-afe8-2881754de71c": {"password": "root", "created_at": "2017-09-28T21:12:19.611354", "email": "[email protected]", "id": "fce12f8a-fdb6-439a-afe8-2881754de71c", "updated_at": "2017-09-28T21:12:19.611368", "first_name": "John", "__class__": "User"}}
guillaume@ubuntu:~/AirBnB$
Write all those classes that inherit from BaseModel
:
State
(models/state.py
):- Public class attributes:
name
: string - empty string.
- Public class attributes:
City
(models/city.py
):- Public class attributes:
state_id
: string - empty string: it will be theState.id
.name
: string - empty string.
- Public class attributes:
Amenity
(models/amenity.py
):- Public class attributes:
name
: string - empty string
- Public class attributes:
Place
(models/place.py
):- Public class attributes:
city_id
: string - empty string: it will be theCity.id
.user_id
: string - empty string: it will be theUser.id
.name
: string - empty string.description
: string - empty string.number_rooms
: integer - 0.number_bathrooms
: integer - 0.max_guest
: integer - 0.price_by_night
: integer - 0.latitude
: float - 0.0.longitude
: float - 0.0.amenity_id
s: list of string - empty list: it will be the list ofAmenity.id
later.
- Public class attributes:
Review
(models/review.py
):- Public class attributes:
place_id
: string - empty string: it will be thePlace.id
.user_id
: string - empty string: it will be theUser.id
.text
: string - empty string.
- Public class attributes:
Update FileStorage
to manage correctly serialization and deserialization of all our new classes: Place
, State
, City
, Amenity
and Review
.
Update your command interpreter (console.py
) to allow those actions: show
, create
, destroy
, update
and all
with all classes created previously.
Enjoy your first console!
Update your command interpreter (console.py
) to retrieve all instances of a class by using: <class name>.all()
.
guillaume@ubuntu:~/AirBnB$ ./console.py
(hbnb) User.all()
[[User] (246c227a-d5c1-403d-9bc7-6a47bb9f0f68) {'first_name': 'Betty', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611352), 'updated_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611363), 'password': '63a9f0ea7bb98050796b649e85481845', 'email': '[email protected]', 'id': '246c227a-d5c1-403d-9bc7-6a47bb9f0f68'}, [User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'first_name': 'Betty', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848291), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': '[email protected]', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}]
(hbnb)
Update your command interpreter (console.py
) to retrieve the number of instances of a class: <class name>.count()
.
guillaume@ubuntu:~/AirBnB$ ./console.py
(hbnb) User.count()
2
(hbnb)
Update your command interpreter (console.py
) to retrieve an instance based on its ID: <class name>.show(<id>)
.
Errors management must be the same as previously.
guillaume@ubuntu:~/AirBnB$ ./console.py
(hbnb) User.show("246c227a-d5c1-403d-9bc7-6a47bb9f0f68")
[User] (246c227a-d5c1-403d-9bc7-6a47bb9f0f68) {'first_name': 'Betty', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611352), 'updated_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611363), 'password': '63a9f0ea7bb98050796b649e85481845', 'email': '[email protected]', 'id': '246c227a-d5c1-403d-9bc7-6a47bb9f0f68'}
(hbnb) User.show("Bar")
** no instance found **
(hbnb)
Update your command interpreter (console.py
) to destroy an instance based on his ID: <class name>.destroy(<id>)
.
Errors management must be the same as previously.
guillaume@ubuntu:~/AirBnB$ ./console.py
(hbnb) User.count()
2
(hbnb) User.destroy("246c227a-d5c1-403d-9bc7-6a47bb9f0f68")
(hbnb) User.count()
1
(hbnb) User.destroy("Bar")
** no instance found **
(hbnb)
Update your command interpreter (console.py
) to update an instance based on his ID: <class name>.update(<id>, <attribute name>, <attribute value>)
.
Errors management must be the same as previously.
guillaume@ubuntu:~/AirBnB$ ./console.py
(hbnb) User.show("38f22813-2753-4d42-b37c-57a17f1e4f88")
[User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'first_name': 'Betty', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848291), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': '[email protected]', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}
(hbnb)
(hbnb) User.update("38f22813-2753-4d42-b37c-57a17f1e4f88", "first_name", "John")
(hbnb) User.update("38f22813-2753-4d42-b37c-57a17f1e4f88", "age", 89)
(hbnb)
(hbnb) User.show("38f22813-2753-4d42-b37c-57a17f1e4f88")
[User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'age': 89, 'first_name': 'John', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 15, 32, 299055), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': '[email protected]', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}
(hbnb)
Update your command interpreter (console.py
) to update an instance based on his ID with a dictionary: <class name>.update(<id>, <dictionary representation>)
.
Errors management must be the same as previously.
guillaume@ubuntu:~/AirBnB$ ./console.py
(hbnb) User.show("38f22813-2753-4d42-b37c-57a17f1e4f88")
[User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'age': 23, 'first_name': 'Bob', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 15, 32, 299055), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': '[email protected]', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}
(hbnb)
(hbnb) User.update("38f22813-2753-4d42-b37c-57a17f1e4f88", {'first_name': "John", "age": 89})
(hbnb)
(hbnb) User.show("38f22813-2753-4d42-b37c-57a17f1e4f88")
[User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'age': 89, 'first_name': 'John', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 17, 10, 788143), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': '[email protected]', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}
(hbnb)
Write all unittests for console.py
, all features!
For testing the console, you should “intercept” STDOUT of it, we highly recommend you to use:
with patch('sys.stdout', new=StringIO()) as f:
HBNBCommand().onecmd("help show")
Otherwise, you will have to re-write the console by replacing precmd by default.