Numpy returns "TypeError: unsupported operand type(s) for *: 'numpy.ufunc' and 'int'"

[paul18fr]

"np.sign" is not used correctly; check the parentheses (see doc; for instance:

import numpy as np
A=np.sign(-10.59)
print(f"A={A}")
B=np.sign(1586.22)
print(f"B={B}")