Reading files line by line in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a file named 'data.txt' for reading.

Python

file = open('data.txt', '[1]')

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

Aw

Ba

Cr

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w' which opens the file for writing and erases content.

Using 'a' which opens the file for appending.

The mode 'r' opens the file for reading only.

2fill in blank

medium

Complete the code to read the first line from the file object 'file'.

Python

line = file.[1]()

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

Awrite

Breadline

Creadlines

Dread

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'read' which reads the whole file content.

Using 'write' which is for writing, not reading.

The method readline() reads one line from the file.

3fill in blank

hard

Fix the error in the code to properly close the file after reading.

Python

file = open('data.txt', 'r')
content = file.read()
file.[1]()

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

Aclose

Bclosed

Cclose()

Dclose_file

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'close()' inside the blank which would cause syntax error.

Using 'closed' which is a property, not a method.

The correct method to close a file is close(), called as file.close().

4fill in blank

hard

Fill both blanks to create a dictionary with words as keys and their lengths as values, only for words longer than 3 characters.

Python

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

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

Alen(word)

B>

C<

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using the word itself as value instead of its length.

Using '<' instead of '>' in the condition.

Use len(word) to get the length and filter words with length greater than 3 using >.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase words as keys and their lengths as values, only for words longer than 3 characters.

Python

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

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

Aword.upper()

Blen(word)

C>

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using the word itself as key instead of uppercase.

Using '<' instead of '>' in the condition.

Use word.upper() for keys, len(word) for values, and filter words with length greater than 3 using >.