Lesson 24 of 55
8 mins readPython Ranges & Lazy Iterators
In Plain English
Ranges represent sequences of numbers using minimal memory (O(1) storage). Learn UnitRange (1:10), StepRange (1:2:10), and LinRange for evenly spaced floats.
Deep Dive: How It Works
UnitRange: 1:10 stores only the start (1) and stop (10) numbers.
StepRange: 10:-2:0 creates a descending range with step -2.
LinRange: LinRange(0.0, 1.0, 5) generates 5 evenly spaced values from 0.0 to 1.0.
Iterators Module: Base.Iterators provides cycle, partition, flatten, and countfrom.
Core Rules to Remember
O(1) Memory Overhead: 1:1_000_000 occupies negligible memory until collected into an array.
LinRange for Numerical Grids: Ideal for plotting and discretizing continuous function domains.
Live Interactive Example
Hit Run Code to see it liveRange Types and LinRange
Python 3.12
1
2
3
4
5
6
7
8
9
10
11
Output Console
Click "Run Code" to view the rendered output.
How it works: LinRange divides the interval [0.0, 1.0] into 5 points with spacing 0.25.
Your Turn: Micro Challenge
No pressure! Edit the starter code below and test your solution with instant feedback.
Micro Exercise
Generate LinRange and Collect
- Create `grid = LinRange(0, 10, 3)`.
- Print `"Points: $(collect(grid))"`.
1
2
Sandbox Output
Click "Run & Check" to test your solution.
Finished reading and practicing?
Mark this lesson as completed to update your course progress.