midPython
Shallow vs Deep Copy
Updated May 4, 2026
Short answer
Cloning objects and nested data.
Deep explanation
Shallow copy (copy()) only clones the top level; nested objects are still shared. Deep copy clones everything recursively.
Real-world example
Duplicating a nested configuration object for a simulation without affecting the original.
Common mistakes
- Modifying a shallow copy and accidentally changing the original object's nested lists.
Follow-up questions
- What module handles this?