You want to read a file and create a dictionary where keys are line numbers (starting at 1) and values are the lines without newline characters. Which code correctly does this?

hard📝 Application Q8 of 15

Python - File Handling Fundamentals

Awith open('file.txt') as f: d = {line: i for i, line in enumerate(f)}

Bwith open('file.txt') as f: d = {i: line for i, line in enumerate(f.readlines())}

Cwith open('file.txt') as f: d = dict(enumerate(f))

Dwith open('file.txt') as f: d = {i+1: line.strip() for i, line in enumerate(f)}

Step-by-Step Solution

Solution:

Step 1: Use enumerate to get line numbers starting at 0
enumerate(f) gives (0, line), (1, line), ...
Step 2: Adjust keys to start at 1 and strip newlines
Use i+1 for keys and line.strip() to remove newlines.
Step 3: Build dictionary comprehension
{i+1: line.strip() for i, line in enumerate(f)} creates desired dictionary.
Final Answer:
with open('file.txt') as f: d = {i+1: line.strip() for i, line in enumerate(f)} -> Option D
Quick Check:
Correct dict comprehension with line numbers and strip [OK]

Quick Trick: Use enumerate and strip() inside dict comprehension [OK]

Common Mistakes:

Not adding 1 to index
Not stripping newline
Using line as key instead of number

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More Python Quizzes

You want to read a file and create a dictionary where keys are line numbers (starting at 1) and values are the lines without newline characters. Which code correctly does this?

Step 1: Use enumerate to get line numbers starting at 0

Step 2: Adjust keys to start at 1 and strip newlines

Step 3: Build dictionary comprehension

Final Answer:

Quick Check:

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