Log out Go to App
Go to App

Learning Materials

Features

Discover

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 correct file access mode is 'rb', which combines reading and binary modes.

Step by step solution

01

Understand Pickling

Pickling is the process of serializing data into a binary format, while unpickling is the deserialization of the binary data back into the original format. In Python, the `pickle` module is used for pickling and unpickling data.
02

List the Different File Access Modes in Python

Python provides several file access modes for reading, writing or appending to a file: 1. `'r'`: Read mode (default) - Opens a file for reading. 2. `'w'`: Write mode - Opens a file for writing, overwrites the file if it exists, or creates a new file if it doesn't. 3. `'a'`: Append mode - Opens a file for writing, appends to the file if it exists, or creates a new file if it doesn't. 4. `'x'`: Exclusive creation - Create a new file, but raise an error if the file already exists. 5. `'b'`: Binary mode - Opens a file in binary format. 6. `'t'`: Text mode (default) - Opens a file in text format. File access modes can be combined (e.g., `'rb'` for reading a binary file).
03

Choose the Correct File Access Mode for Retrieving a Pickled Object

When retrieving a pickled object from a file, you want to read the binary data from the file. As stated before, the `'r'` mode is for reading and the `'b'` mode is for binary access. Therefore, the correct file access mode is `'rb'`, which combines reading and binary modes.

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!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

What does the items method return?

An element in a dictionary has two parts. What are they called?

What does the values method return?

What will the following code display? stuff \(=\\{1: \text { 'aaa', } 2:\) 'bbb', 3 : 'ccc' for \(k\) in stuff: print (k)

After the following statement executes, what elements will be stored in the myset set? myset \(=\) set (' Jupiter')
See all solutions

Recommended explanations on Computer Science Textbooks

Computer Organisation and Architecture

Read Explanation

Functional Programming

Read Explanation

Computer Programming

Read Explanation

Computer Systems

Read Explanation

Algorithms in Computer Science

Read Explanation

Data Structures

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free