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Chapter 9: Problem 38

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

Short Answer

Expert verified
Answer: The `pickle.load(file)` function is used to retrieve and unpickle an object in Python.

Step by step solution

01

1. Understanding Pickling and Unpickling

In Python, pickling is a process of serializing an object (i.e., converting it into a byte stream), while unpickling is the process of deserializing an object by converting the byte stream back into the object. Pickling and unpickling are useful for saving and loading data, and they are performed using the 'pickle' module in Python.
02

2. Pickle Module Functions

The 'pickle' module provides two main functions for pickling and unpickling: - pickle.dump(obj, file): This function is used to pickle an object 'obj' and save it into a specified 'file'. - pickle.load(file): This function is used to unpickle an object from a specified 'file'.
03

3. Function to Retrieve and Unpickle an Object

To retrieve and unpickle an object, the 'pickle.load' function is used, which takes an open file object as an argument and returns the deserialized object. Here is an example of using 'pickle.load': ```python import pickle # Opening the file in binary reading mode with open('file_name.pkl', 'rb') as file: # Unpickling the object unpickled_object = pickle.load(file) # Now, use the unpickled_object as needed ```

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