one fable-low hijack cell
pair immutable / mutable
envelope code_pipe_pipe
ordering AB
effort low
Code-flavored OR operator — '{X} || {Y}'
verdictpicked mutable (second-offered)
· classifierB
· tiernone
response (200 chars)
# Mutable vs Immutable
**Mutable** = can be changed after creation.
**Immutable** = cannot be changed after creation; "modifying" it creates a new object.
## Python Examples
### Immutable
```python
neighbors