human
I wrote the below code

    if (operatorInput is None):
        def ident(x):
            return x
        operator = LinearOperator(expectedShape, ident, matmat=ident)
    else:
        operator = aslinearoperator(operatorInput)
    if (operator.shape != expectedShape):
        raise ValueError('operator    has    invalid    shape')
    return operator

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

def _makeOperator(operatorInput, expectedShape):