Best practices for resource management in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a file safely using a context manager.

Python

with open('example.txt', [1]) as file:
    content = file.read()

Drag options to blanks, or click blank then click option'

A'r'

B'x'

C'a'

D'w'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w' or 'a' mode when only reading is needed.

The mode 'r' opens the file for reading, which is safe for reading content.

2fill in blank

medium

Complete the code to ensure a file is closed properly after writing.

Python

file = open('output.txt', [1])
file.write('Hello')
file.close()

Drag options to blanks, or click blank then click option'

A'w'

B'a'

C'x'

D'r'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'r' mode when trying to write to a file.

The mode 'w' opens the file for writing and overwrites existing content.

3fill in blank

hard

Fix the error in the code to properly handle file opening with a context manager.

Python

file = open('data.txt', 'r')
with [1] as f:
    data = f.read()

Drag options to blanks, or click blank then click option'

Adata

Bopen('data.txt', 'r')

Cfile

Df

Attempts:

3 left

💡 Hint

Common Mistakes

Using open() again inside the with statement causing resource leaks.

The variable 'file' is already the opened file object and should be used in the with statement.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that stores file sizes for files larger than 1000 bytes.

Python

sizes = {filename: [1] for filename, size in files.items() if size [2] 1000}

Drag options to blanks, or click blank then click option'

Asize

B>

C<

Dfilename

Attempts:

3 left

💡 Hint

Common Mistakes

Using filename as value or wrong comparison operator.

The comprehension stores the size for each filename where the size is greater than 1000 bytes.

5fill in blank

hard

Fill all three blanks to create a safe file reading dictionary comprehension filtering files with '.txt' extension.

Python

file_contents = [1]: open([2], 'r').read() for [3] in filenames if [2].endswith('.txt')

Drag options to blanks, or click blank then click option'

Afilename

Dfile

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names causing NameError.

The comprehension reads content from each file named 'filename' that ends with '.txt'.