human
Here's a good function header given the following:
I wrote the below code

    from .dense import Matrix
    def normalize(m):
        if (is_sequence(m) and (not isinstance(m, MatrixBase))):
            return Matrix(m)
        return m
    values = (normalize(m) for m in values)
    return Matrix.diag(*values, **kwargs)

What's a good function header?
assistant
#Here's a good function header.

def diag(*values, **kwargs):