Module 1 Overview

Module 1 — NumPy Fundamentals & Array Creation

Welcome

This module lays the foundation for the whole course: what an ndarray actually is, how to create one in every common way, how to inspect it, and how to reshape and combine arrays. Every later module builds on these mechanics, so take your time with the exercises here.

Learning goals

• Explain why NumPy arrays outperform plain Python lists for numeric work
• Create arrays with np.array, np.zeros/ones/full/eye, np.arange, np.linspace
• Read an array’s shape, ndim, size, dtype, itemsize
• Cast between dtypes with .astype
• Reshape, flatten, and transpose arrays
• Combine and split arrays along an axis

Setup — run this first.