NumPy Changed This Array Without Moving It 🤯

Added: 2026-05-05

[00:00:00]This NumPy array isn't really 3D.

[00:00:02]Even though this looks like a multi-dimensional array, NumPy stores everything as a single block of memory just a flat sequence of bytes.

[00:00:09]Strides tell NumPy how many bytes to jump to move along each axis.

[00:00:13]For this 3D array, moving along columns?

[00:00:15]small jump.

[00:00:16]along rows?

[00:00:17]bigger jump.

[00:00:18]across layers?

[00:00:19]even bigger jump.

[00:00:20]Now when you transpose this from shape (2, 3, 4) to (4, 3, 2) NumPy... doesn't move any data.

[00:00:25]It just changes how it walks through memory.

[00:00:28]Same bytes.

[00:00:28]New perspective.

[00:00:29]And that’s why it’s fast.

[00:00:31]More NumPy insights coming up Stay tuned.