Pyrmanent
A base class to make your Python classes permanent in a flash.
Features
- Easy to use.
- Great compatibility.
- No database needed.
- Ask for new features through the issues section.
- Join our Telegram group for support or development.
Installation
You can install or upgrade the module with:
pip install pyrmanent --upgrade
Usage guide
Basic usage:
Making your custom clases permanent is as easy as adding Pyrmanent as the base class.
from pyrmanent import Pyrmanent
class MyClass(Pyrmanent):
pass
Call the save method to save the current instance data:
my_class_instance = MyClass()
my_class_instance.my_data = "Hello world!"
my_class_instance.save()
To load a previously saved instance data, just create the instance and data will be automatically loaded:
my_class_instance = MyClass()
print(my_class_instance.my_data)
"Hello world!"
Configuration
Instance name
The name parameter allows saving different instances of the same class. Each one will keep its own data.
first_instance = MyClass(name="first")
first_instance.my_data = "This is the first instance"
first_instance.save()
second_instance = MyClass(name="second")
second_instance.my_data = "And this the second one"
second_instance.save()
Saving path
The path for the saved files can be customized with the folder parameter. If not provided, the files will be saved on the execution folder.
my_class_instance = MyClass(folder="data")
Auto saving
The autosave parameter allows using the autosave method to save data only when True. This is specially useful for your custom class methods.
class MyClass(Pyrmanent):
def set_title(self, title):
self.title = title
self.autosave()
# The instance data will be saved when the method is called
my_class_instance = MyClass(autosave=True)
my_class_instance.set_title("Test")
# You should manually save the instance data
my_class_instance = MyClass(autosave=False)
my_class_instance.set_title("Test")
my_class_instance.save()
Instance initialization
Override the __init__ method
The __init__ method can be overrided to provide default configurations, like for example the saving path in below example.
class MyClass(Pyrmanent):
def __init__(self, name, autosave=True):
super().__init__(name=name, folder="data", autosave=autosave)
The init method
On the other hand, you can define the init method (without the underscores) to initialize attribute values. This method is called before saving the instance data for the first time.
class MyClass(Pyrmanent):
def init(self):
self.first_value = 1
self.second_value = 2
Use dill instead of pickle
Dill extends the compatibility with several data types that pickle module can't serialize. It provides the same interface, so it's totally compatible without any code change needed. To start using dill, just install it using pip and it will be used by default:
pip install dill --upgrade
To stop using dill, just uninstall it. You can find more information about dill in the official repo.
License
Copyright © 2021 Sergio Abad. See license for details.
4.6k Jan 2, 2023
45 Nov 24, 2022
67 Nov 29, 2022
5 May 1, 2022
4 Dec 3, 2021
3 Dec 17, 2022
19 Dec 15, 2022
13 Dec 23, 2022
529 Dec 31, 2022
5.9k Dec 30, 2022
2 Jan 09, 2022
2 Feb 26, 2022
14 Dec 09, 2022
2 Mar 01, 2022
5 Dec 06, 2022
1 Oct 24, 2021
2 Jan 13, 2022
15 Nov 21, 2021
20 Jan 02, 2023
0 Dec 07, 2021
1 Nov 24, 2021
2 Jan 20, 2022
1 Dec 01, 2021
1 Dec 15, 2021
9 Dec 16, 2022
3 Jul 07, 2022
5 Jul 07, 2022
4 Nov 08, 2021