`numpy:broadcast`

Signature

class broadcast ( * arrays )

Produce an object that mimics broadcasting.

b : broadcast object: Broadcast the input parameters against one another, and return an object that encapsulates the result. Amongst others, it has shape and nd properties, and may be used as an iterator.

Manually adding two vectors, using broadcasting:

import numpy as np
x = np.array([[1], [2], [3]])
y = np.array([4, 5, 6])
b = np.broadcast(x, y)

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out = np.empty(b.shape)
out.flat = [u+v for (u,v) in b]

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out

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Compare against built-in broadcasting:

x + y

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