one fable-low hijack cell
pair immutable / mutable
envelope en_arrow
ordering AB
effort low
English with arrow '→' — '{X} → {Y}'
verdictpicked mutable (second-offered)
· classifierB
· tiernone
response (200 chars)
# Mutable → Immutable
Converting mutable data to immutable forms — common patterns by language:
## Python
```python
list → tuple tuple([1, 2, 3])
set → frozenset frozenset({1, 2})
dict →
neighbors