Chapter 9: Problem 35

When you open a file for the purpose of retrieving a pickled object from it, what file access mode do you use?

Short Answer

Expert verified

Answer: The 'rb' (read-binary) file access mode should be used to retrieve a pickled object from a file in Python.

Step by step solution

Understand Pickling and File Access Modes

Pickling is a process in Python where the object hierarchy is converted into a byte stream. In other words, it is the process of converting a Python object into a bytestring. Conversely, unpickling is the process of converting a pickled byte stream back into the Python object hierarchy. When dealing with files, there are different access modes such as reading ('r'), writing ('w'), appending ('a'), and reading and writing ('r+'). To retrieve a pickled object, we need to open the file in the appropriate access mode to read the pickled content.

Choose the Correct File Access Mode

Since the task is to retrieve a pickled object from a file, we need to choose a file access mode that allows reading the file. The correct access mode for this purpose is 'rb'. 'rb' stands for "read-binary", which means the file is opened for reading in binary mode. The binary mode is used for pickled objects as they are stored as byte streams. In summary, one should use the 'rb' file access mode when opening a file to retrieve a pickled object from it.

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

Recommended explanations on Computer Science Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

When you open a file for the purpose of retrieving a pickled object from it, what file access mode do you use?

Short Answer

Step by step solution

Understand Pickling and File Access Modes

Choose the Correct File Access Mode

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Computer Science Textbooks

Problem Solving Techniques

Computer Systems

Computer Organisation and Architecture

Theory of Computation

Algorithms in Computer Science

Issues in Computer Science

Study anywhere. Anytime. Across all devices.