TypeError: 'Add' object is not callable

[Lain Cortés González]

Traceback (most recent call last):
  File "./H.py", line 130, in <module>
    r5 = newton_method(0, w())
  File "./H.py", line 123, in newton_method
    fprime = lambdify(t,diff(w(), t), 'numpy')
TypeError: 'Add' object is not callable

I got the error before this, after I run these functions:

from sympy.utilities import lambdify
from sympy.abc import b, c, d, f as F, g, h, t , z, q
from sympy import diff
import numpy as np



def w(x=t):
    return b*(x) + c*(x**2) + d*(x**3) + F*(x**4) + g*(x**5) + h*(x**6) - z

def m(x=t):
    return b*x - z
   
def newton_method(x, w, n=5):
    fprime = lambdify(t,diff(w(), t), 'numpy')
    for i in range(n):
        if fprime(x) == 0:
            return x
        x -= np.divide(lambdify(x, w(x), 'numpy'), fprime(x))
    return x

r5 = newton_method(0, w())

r6 = newton_method(0, m(), 12)

What am I missing?

[Nathan Goldbaum]

I think you want to say:

r5 = newton_method(0, w)

Or you could make it so line 1 of your newton_method function doesn't use w as a callable.

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[Lain Cortés González]

Thanks a lot, my mistake. You're right. I'm coming from a pure not object-oriented language (C) so sometimes I forget that even functions are objects. Again, thanks a lot.