Flushing and buffering concepts in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to flush the output buffer immediately.

Python

print('Hello, world!', end='')
import sys
sys.stdout.[1]()

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

Awrite

Bflush

Cclose

Dread

Attempts:

3 left

💡 Hint

Common Mistakes

Using write() instead of flush()

Trying to use close() which stops output

Using read() which is for input

The flush() method forces the output buffer to be written immediately.

2fill in blank

medium

Complete the code to open a file with buffering disabled.

Python

with open('log.txt', 'w', buffering=[1]) as f:
    f.write('Log start\n')

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ANone

B1

C-1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using -1 which means default buffering

Using None which is invalid here

Using 1 which means line buffering

Setting buffering=0 disables buffering for the file.

3fill in blank

hard

Fix the error in flushing the file output.

Python

f = open('data.txt', 'w')
f.write('Data')
f.[1]()

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Aflush

Bflushes

Cflushd

Dflushed

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect method names like flushes or flushed

Trying to call flush as an attribute

The correct method to flush a file's buffer is flush().

4fill in blank

hard

Fill both blanks to create a dictionary of word lengths for words longer than 3 letters.

Python

words = ['apple', 'bat', 'carrot', 'dog']
lengths = {word: [1] for word in words if len(word) [2] 3}

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Alen(word)

B>

C<

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using the word itself as value instead of length

Using less than instead of greater than in condition

The dictionary comprehension uses len(word) for values and filters words with length greater than 3.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys and values greater than 0.

Python

data = {'a': 1, 'b': 0, 'c': 3}
result = { [1]: [2] for k, v in data.items() if v [3] 0 }

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Ak.upper()

Bv

C>

Dk

Attempts:

3 left

💡 Hint

Common Mistakes

Using original keys instead of uppercase

Using less than or equal instead of greater than

Using keys as values instead of values

The dictionary comprehension uses uppercase keys, values as is, and filters values greater than zero.