Creating arrays in Python

The array constructors and shape basics of NumPy.

import numpy as np

zeros = np.zeros(5)
ramp = np.arange(0, 10, 2)
grid = np.linspace(0, 1, 5)
ones = np.ones((2, 3))

data = np.array([[1, 2, 3], [4, 5, 6]])
shape = data.shape
kind = data.dtype
reshaped = data.reshape(3, 2)
flat = data.ravel()

How it works

1. zeros, arange, and linspace build arrays.
2. shape and dtype describe an array.
3. reshape and ravel change its layout.

Keywords and builtins used here

• as

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Step 1 of 2 in Arrays, step 1 of 22 in NumPy.

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