How to Save and Load Multiple Objects in a Python Pickle File?

Saving and Loading Multiple Objects in a Python Pickle File

To save multiple objects in a pickle file, follow these steps:

<code class="python">import pickle

# Create a list of objects to be saved
objects_to_save = [object1, object2, ...]

# Open a binary file for writing
with open('my_pickle_file', 'wb') as file:

    # Pickle each object and write it to the file
    for obj in objects_to_save:
        pickle.dump(obj, file)</code>

To load multiple objects from a pickle file:

<code class="python"># Open the binary file for reading
with open('my_pickle_file', 'rb') as file:

    # Load and print each object from the file
    while True:
        try:
            obj = pickle.load(file)
            print(obj)
        except EOFError:
            break</code>

Additional Considerations:

• Using Lists: Storing objects in a list before pickling can provide flexibility, but it adds an extra layer of abstraction.
• Alternative Approaches: Other methods like JSON or NumPy's savez may be suitable for certain scenarios.
• Generator: The provided solution generates objects on demand, avoiding memory limitations.
• Efficiency: If the file is large, using a generator to load objects in a loop may be more efficient than loading the entire file into memory.

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