Python - Standard Library Usage
You want to create a new directory named 'backup' only if it does not exist. Which code snippet correctly does this?
You want to create a new directory named 'backup' only if it does not exist. Which code snippet correctly does this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand directory creation
os.mkdir()creates a directory but raises error if it exists.Step 2: Check existence before creating
Usingos.path.exists()to check prevents error by creating only if missing.Step 3: Analyze other options
os.makedirs()can create nested dirs but without check may error; calling mkdir twice causes error.Final Answer:
Check existence then mkdir -> Option BQuick Check:
Check before mkdir to avoid errors [OK]
Quick Trick: Check if folder exists before mkdir to avoid errors [OK]
Common Mistakes:
- Calling mkdir twice
- Not checking existence
- Confusing makedirs with mkdir
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