File Handling - Quiz

Open a text file named notes.txt for reading using the correct mode.

Join a base directory and a filename into one path using the standard library.

Serialize a dictionary as JSON and write it to an open file object.

Which statement best describes a file in Python?

Which file mode opens a file for appending new text at the end, creating it if it does not exist?

Which file method moves the current file position to a specific byte offset?

You want a path representation that works consistently across platforms and supports methods like .exists(). Which module is designed for this?

Which os function lists the entries in a directory?

Which shutil function copies an entire directory tree to a new location?

Which json function converts a Python dict into a JSON-formatted string?

You must read a CSV file and access values by column name. Which reader is most convenient?

Which pickle function reconstructs a Python object from a binary file?

Which path type describes a path relative to the current working directory?

What is a safe way to ensure a file is closed after reading?

Order the steps to read JSON configuration from a file into a Python dict.

Drag and drop to reorder, or use the arrows.

Order the steps to copy a directory to a backup location using shutil.

Drag and drop to reorder, or use the arrows.

What is the output of this code that reads part of a text file?

1content = 'Line1\nLine2\nLine3'
2from io import StringIO
3file_obj = StringIO(content)
4first_line = file_obj.readline().strip()
5print(first_line)

What is the output when using pathlib to get a file name?

1from pathlib import Path
2p = Path('data') / 'sub' / 'values.csv'
3print(p.name)

What will this code print when serializing and deserializing with pickle?

1import pickle
2numbers = [1, 2, 3]
3blob = pickle.dumps(numbers)
4restored = pickle.loads(blob)
5print(len(restored))

Find the bug in this code that reads a file line by line and counts lines.

Click on the line(s) that contain the bug.

def count_lines(path):

    count = 0

    with open(path, 'w') as handler:

        for _ in handler:

            count += 1

    return count

Find the bug in this code that loads JSON from a file.

Click on the line(s) that contain the bug.

import json

def load_settings(path):

    with open(path, 'r') as config_file:

        json.load(path)

        return config_file

Match each file-related module to its primary purpose.

Click an item on the left, then click its match on the right. Click a matched item to unmatch.

Match each file object method to what it returns or affects.

Click an item on the left, then click its match on the right. Click a matched item to unmatch.

Complete the code to read all rows from a CSV file and collect them into a list.

Complete the code to create a directory (and parents if needed) using pathlib and check if it exists.

Complete the code to append a log line to a text file in a safe way.

Complete the code to write a Python dict as nicely formatted JSON.

Click the line that reads the entire file content into memory.

Click on the line to select.

config_path = 'settings.ini'

with open(config_path, 'r') as config_file:

    content = config_file.read()

print('Loaded configuration')

Click the line that uses shutil to move a file to a backup location.

Click on the line to select.

import shutil

source_file = 'data.db'

backup_file = 'backup/data.db'

shutil.move(source_file, backup_file)

print('Backup complete')