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Python Intermediate

What is Pickle?

Python's built-in module for serializing and deserializing Python objects into a byte stream for storage or transmission.

Pickle converts Python objects (lists, dictionaries, classes, machine learning models) to bytes and back. Usage: pickle.dump(obj, file) to save, pickle.load(file) to restore. It handles complex object graphs including circular references.

Security warning: Never unpickle data from untrusted sources — it can execute arbitrary code. For safe serialization, use JSON (simple types), MessagePack, or Protocol Buffers. Pickle is useful for caching, ML model storage, and inter-process communication.

Related Terms

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A standard library module providing type hints for function signatures and variables, enabling static analysis without runtime enforcement.
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A formatted string literal prefixed with f that allows embedding Python expressions directly inside curly braces.
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An isolated Python environment that maintains its own set of packages, independent of the system Python installation.
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A concise syntax pattern for creating collections by transforming and filtering items from iterables.
Walrus Operator
The := operator that assigns a value to a variable as part of an expression, introduced in Python 3.8.
ABC (Abstract Base Class)
A class that defines a common interface for subclasses by declaring abstract methods that must be implemented.
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