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Chapter 10: Problem 38

What function do you call to retrieve and unpickle an object?

Short Answer

Expert verified
Answer: The `pickle.load()` function is used to retrieve and unpickle an object in Python. The steps to achieve this are: 1. Import the `pickle` library. 2. Open the file containing the pickled object in 'rb' (read binary) mode. 3. Call the `pickle.load()` function to unpickle the object. 4. Close the file after unpickling the object.

Step by step solution

01

Import the required library

First, you need to import the `pickle` library since it provides the essential functions for pickling and unpickling objects. ```python import pickle ```
02

Open the file containing the pickled object

To retrieve the pickled object, open the file it is stored in using the `open()` function. Use the appropriate file mode, in this case 'rb' (read binary), since the pickled data is stored in binary format. ```python file = open("pickled_object.pkl", "rb") ```
03

Unpickle the object

Call the `pickle.load()` function to unpickle an object. This function reads and converts the pickled data back into a Python object. ```python unpickled_object = pickle.load(file) ```
04

Close the file

After unpickling the object, close the file to release the file resource. ```python file.close() ``` Now, the variable `unpickled_object` contains the original Python object.

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