Chapter 10: Problem 37

What function do you call to pickle an object?

Short Answer

Expert verified

Answer: Pickling is the process of converting a Python object into a byte stream using the "pickle" module. The function "pickle.dump()" is used to pickle an object by taking the object and a file object as arguments. The file must be opened in binary write mode ('wb'). For example, to pickle a dictionary, open a file, and use the "pickle.dump()" function to store the pickled data in the file. To verify the pickling process, we can unpickle the object using "pickle.load()" function and compare the resulting object with the original one.

Step by step solution

Understand what pickling means

Pickling is the process of converting a Python object (like lists, dictionaries, or other data structures) into a byte stream. This is useful for saving the object in a file or sending it over a network.

Identify the module needed for pickling

The "pickle" module in Python is used to perform the operations related to pickling. First, we need to import this module. #tag_code# import pickle

Learn the function to pickle an object

The function used to pickle an object is "pickle.dump()". This function takes two arguments: the object to be pickled and the file object where the pickled object will be written.

Create an object to pickle

Let's create a simple data structure (a dictionary) to pickle. #tag_code# sample_dict = {"fruit": "apple", "quantity": 5, "price": 3.0}

Open a file to pickle the object

We will need to open a file in binary write mode ('wb') to store the pickled object. #tag_code# with open("sample_pickle_file.pkl", "wb") as file: pickle.dump(sample_dict, file)

Verify the pickling process

Now that we have pickled the object, we can verify the process by unpickling the object using "pickle.load()" function and compare the resulting object with the original one. #tag_code# with open("sample_pickle_file.pkl", "rb") as file: unpickled_dict = pickle.load(file) print(unpickled_dict) # Should output {"fruit": "apple", "quantity": 5, "price": 3.0}

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What function do you call to pickle an object?

Short Answer

Step by step solution

Understand what pickling means

Identify the module needed for pickling

Learn the function to pickle an object

Create an object to pickle

Open a file to pickle the object

Verify the pickling process

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