With statement execution flow in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a file using the with statement.

Python

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

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

A'open'

B'write'

C'r'

D'close'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'write' instead of 'r' causes an error when reading.

Using 'open' or 'close' as mode is invalid.

The mode 'r' opens the file for reading inside the with block.

2fill in blank

medium

Complete the code to ensure the file is automatically closed after the with block.

Python

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

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

Aopen

Bwrite

Cread

Dclosed

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'open' or 'read' instead of 'closed' attribute.

Trying to manually close the file inside the with block.

The file is automatically closed after the with block, so file.closed is True.

3fill in blank

hard

Fix the error in the with statement to correctly handle exceptions.

Python

try:
    with open('log.txt', 'r') as file:
        content = file.read()
except [1] as e:
    print('Error:', e)

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

AFileNotFoundError

BException

CValueError

DIOError

Attempts:

3 left

💡 Hint

Common Mistakes

Catching a general Exception instead of the specific FileNotFoundError.

Using ValueError which is unrelated.

FileNotFoundError is the specific exception when the file does not exist.

4fill in blank

hard

Fill both blanks to create a context manager that prints messages before and after the block.

Python

class MessageManager:
    def __enter__(self):
        print([1])
    def __exit__(self, exc_type, exc_val, exc_tb):
        print([2])

with MessageManager():
    print('Inside block')

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

A'Entering block'

B'Exiting block'

C'Start'

D'End'

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the messages between __enter__ and __exit__.

Using generic words like 'Start' and 'End' that are less clear.

The __enter__ method prints 'Entering block' before the block, and __exit__ prints 'Exiting block' after.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps file names to their sizes if size is greater than zero.

Python

files = {'a.txt': 100, 'b.txt': 0, 'c.txt': 50}
sizes = [1]: [2] for [3] in files.items() if [2] > 0

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

Aname

Bsize

Cname, size

Dfiles

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'files' instead of unpacking variables in the loop.

Not filtering sizes greater than zero.

The comprehension maps each file name to its size only if size > 0. The loop unpacks name and size from files.items().