Python - Standard Library Usage
You need to create a dictionary where keys are integers from 1 to 4 and each value is a random float between 0 and 1. Which of the following code snippets achieves this correctly?
You need to create a dictionary where keys are integers from 1 to 4 and each value is a random float between 0 and 1. Which of the following code snippets achieves this correctly?
hard🚀 Application Q8 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand the requirement
Keys are integers from 1 to 4, values are random floats between 0 and 1.Step 2: Check each option
import random result = {i: random.random() for i in range(1, 5)} uses a dictionary comprehension with keys from 1 to 4 and values from random.random(), which returns a float in [0.0, 1.0). This matches the requirement.
import random result = {random.random(): i for i in range(1, 5)} incorrectly uses random.random() as keys.
import random result = {i: random.randint(0, 1) for i in range(1, 5)} uses random.randint(0, 1), which returns integers 0 or 1, not floats.
import random result = {i: random.uniform(1, 5) for i in range(1, 5)} uses random.uniform(1, 5), which generates floats between 1 and 5, not between 0 and 1.Final Answer:
Option A -> Option AQuick Check:
Keys 1-4 with random floats 0-1? Yes. [OK]
Quick Trick: Use random.random() for floats between 0 and 1 [OK]
Common Mistakes:
MISTAKES- Using random.randint for floats
- Using random.random() as keys
- Using wrong range in random.uniform
Master "Standard Library Usage" in Python
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Python Quizzes