Mojo Miji - A Guide to Mojo Programming Language from A Pythonista's Perspective

by Yuhao Zhu (朱宇浩)

Notes

This Miji is compatible with Mojo v0.26.1 (2026-01-29).

For the example programs featured in this Miji, you can find them in the GitHub repository.

• INTRODUCTION
• PART I: START WITH MOJO
  • 1 Install pixi and extension (Package manager and VS Code extension)
  • 2 Initiate Mojo project (Install Mojo compiler)
  • 3 My first Mojo program (Hello, world!)
• PART II: MOVE INTO MOJO
  • 4 Convert Python code into Mojo (Four examples, Python becomes Mojo)
  • 5 Things that are in common (Similarities between Python and Mojo)
  • 6 Things that are different (Differences between Python and Mojo)
• PART III: BASIC MOJO
  • 7 Variables
  • 8 Copy and move
  • 9 Data types - basic (Int, float, bool, etc.)
  • 10 Data types - composite (List et al.)
  • 11 Data type - string (similar to str in Python)
  • 12 Literals and type inference
  • 13 Functions
  • 14 Operators and assignment expressions
  • 15 Control flows (Loops and conditionals)
  • 16 Error handling and raises (Exceptions)
  • 17 Structs (Similar to classes in Python)
  • 18 Modules and packages (Modular programming)
  • 19 Use Python in Mojo (Your Python code can still be used!)
• PART IV: ADVANCED MOJO
  • 20 Data type - SIMD (The first-class SIMD type)
  • 21 Parameterization
  • 22 Generic and traits
  • 23 Ownership (The ownership system)
  • 24 References and pointers (The borrowing system)
  • 25 Lifetimes and origins (The lifetime system)
• PART V: APPLY MOJO (Let's use Mojo to program something useful)
  • 26 Calendar app in Mojo (A command-line calendar app)
  • 27 Matrix library in Mojo (A simple matrix library)
• PART VI: EXTEND MOJO
  • 28 Arbitrary-precision numbers (A library for arbitrary-precision integers and decimals)
  • 29 Multi-dimensional arrays (A library for numerical computing and NDArray)

• PART VII: MISCELLANEOUS
  • Glossary of Mojo terms (Find explanations of key terms and concepts)
  • Tips and warnings (Do not fall into the pits I fell into)
  • Useful resources and links (Online resources and links related to Mojo)
  • About the author (A brief introduction of the author)