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Pythonic Practice for Getters and Setters
When working with getter and setter methods in Python, it's crucial to adopt a Pythonic approach that aligns with the language's best practices. Instead of using explicit get_property() and set_property() methods, which require manual implementation:
def set_property(property, value): def get_property(property):
Or directly setting and retrieving attributes via object properties:
object.property = value value = object.property
The preferred Pythonic method utilizes property decorators to define getters and setters. This technique provides a concise and intuitive interface for accessing instance variables.
Property Decorators:
class C(object): def __init__(self): self._x = None @property def x(self): """I'm the 'x' property.""" print("getter of x called") return self._x @x.setter def x(self, value): print("setter of x called") self._x = value @x.deleter def x(self): print("deleter of x called") del self._x
Usage:
Create an instance of the class:
c = C()
Set the property:
c.x = 'foo' # setter called
Retrieve the property:
foo = c.x # getter called
Delete the property:
del c.x # deleter called
By employing Python's property decorators, you can achieve getter and setter functionality with a more Pythonic and elegant syntax, maintaining code clarity and simplifying property management.
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