[hahahaha23]

To be honest, I don’t understand its popularity.

For example, I was trying to understand a batch normalization function defined as

def batchnorm_forward(x, gamma, beta, eps):

I can’t tell if gamma/beta are scalar or vector?

[tedmiston]

We have type annotations in python now which can be used to clarify data types in function signatures.

https://docs.python.org/3/library/typing.html

[brorfred]

Wouldn't the default assumption be that you can use either a scalar or vector?

[happy-go-lucky]

You could try np.isscalar() and np.array().ndim in NumPy.