Handling large files efficiently in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a large file for reading.

Python

with open('large_file.txt', [1]) as file:
    pass

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A'r'

B'w'

C'a'

D'x'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w' or 'a' when you want to read the file.

To read a file, you open it with mode 'r'.

2fill in blank

medium

Complete the code to read a large file line by line efficiently.

Python

with open('large_file.txt', 'r') as file:
    for [1] in file:
        print(line.strip())

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Atext

Bline

Cchar

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'char' or 'word' which do not represent lines.

Each iteration reads one line, so 'line' is a good variable name.

3fill in blank

hard

Fix the error in the code to read a large file in chunks.

Python

with open('large_file.txt', 'r') as file:
    while True:
        chunk = file.read([1])
        if not chunk:
            break
        print(chunk)

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ANone

B'1024'

C1024

D''

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a string instead of an integer to read().

The read() method expects an integer for the number of characters to read.

4fill in blank

hard

Fill both blanks to create a dictionary with word lengths for words longer than 3 characters.

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<

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' or '==' which filter wrong words.

We want the length of each word and only words longer than 3 characters.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys and the original words as values for words longer than 4 characters.

Python

words = ['apple', 'bat', 'carrot', 'dog']
result = { [1]: [2] for word in words if len(word) [3] 4 }

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Aword.upper()

Bword

C>

Dlen(word)

Attempts:

3 left

💡 Hint

Common Mistakes

Using len(word) as value or wrong comparison operators.

Keys are uppercase words, values are original words, filtered by length > 4.