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OOP & classes

Classes, instances, methods, dataclasses, and object-oriented design in Python.

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How to Use __getstate__ and __setstate__ for Pickle in Python

Customize Python object serialization with the pickle __getstate__ and __setstate__ hooks to control exactly what data is stored and how it is restored.

pickle serialization getstate
Python 
import pickle

class Temperature:
    def __init__(self, celsius):
        self.celsius = celsius

    def __getstate__(self):
        """Customize what gets pickled."""
        state = self.__dict__.copy()
        # Convert to Fahrenheit for storage (simulate transformation)
        state['fahrenheit'] = (self.celsiu…
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