Why does my code not work?

[evaoyg]

Hi!

I'm trying to make a code that solves my equations with newtons method, but python prints "TypeError: 'float' object is not callable". I have tried different numbers of parentheses and to use Decimal insted, but nothing works.

I would appreciate it if someone could help me. Thanks! :-)

from  math import pi, sin, cos
from decimal import Decimal

m = 3
g = 9.8
R = 2
I = 12
x = 3*pi/4
eps = 0.000000001

def dadx(x):
    return (-m*g*R/(I))*cos(x)

def d2adx2(x):
    return (m*g*R/(I)*sin(x))

def newtonsb(dadx,d2adx2,x,eps):
    while abs(dadx(x))>eps:
        x - float(dadx(x))/d2adx2(x)
    return x

print "Maximum angular acceleration for releasing point x is at angle", newtonsb(dadx,d2adx2(x),x,eps)

[buran]

Probably what you want to do is this

from  math import pi, sin, cos
from decimal import Decimal
 
m = 3
g = 9.8
R = 2
I = 12
x = 3*pi/4
eps = 0.000000001
 
def dadx(x):
    return (-m*g*R/(I))*cos(x)
 
def d2adx2(x):
    return (m*g*R/(I)*sin(x))
 
def newtonsb(x):
    while abs(dadx(x))>eps:
        x =- float(dadx(x))/d2adx2(x)
        print x
    return x
 
print "Maximum angular acceleration for releasing point x is at angle", newtonsb(x)

That is assuming m, g, R, I, eps are global constants.
Alo on line 19 - I guess you want to change x value. The line in your code would do nothing (i.e. will not change x) and it will be infinite loop. I added print on line 20, just to see x change, you can remove it.
Finally, it looks you are using python2. You really should be using python3, official support for python2 ends 2020

[evaoyg]

Thank you so much! Now it works. The error in line 19 was just something that went wrong when I tried to fix the code.

The reason I'm using Python 2 is that my professor prefers this version and all the lecture notes are made in Python 2.