Lists & Tuples In Depth
Python · Beginner
Definition
Lists are mutable ordered collections; tuples are immutable ordered collections.
The most used containers in Python.
Diagram
Flowchart
Example: Slicing and unpacking
a = [10, 20, 30, 40]
x, *rest = a
print(a[1:3], a[::-1], x, rest)Output: [20, 30] [40, 30, 20, 10] 10 [20, 30, 40]
Complexity
append O(1) · insert(0) O(n) · pop() O(1)
Key points
- Slices create copies
- Use copy.deepcopy for nested lists
Interview questions
Why does [[0]*3]*3 cause bugs?
All rows refer to the same inner list.