TypeError: 'numpy.float64' object is not callable

So, what im trying to do is get certain numbers from certain positions in a array of a given > range and put them into an equation

yy = arange(4)
xx = arange(5)
Area = ((xx[2] - xx[1])(yy[2] + yy[1])) / 2

I try to run it and I get this..

----> ((xx[2] - xx[1])(yy[2] + yy[1])) / 2
TypeError: 'numpy.int64' object is not callable

I get error.. how can I use certain numbers in an array and put them into an equation?

4 Answers

Python does not follow the same rules as written math. You must explicitly indicate multiplication.

Bad:

(a)(b)

(unless a is a function)

Good:

(a) * (b)

This error also occurs when your function has the same name as your return value

def samename(a, b): samename = a*b return samename

This might be a super rookie mistake, I am curious how often this answer will be helpful.

You are missing * when multiplying, try:

import numpy as np
yy = np.arange(4)
xx = np.arange(5)
Area = ((xx[2] - xx[1])*(yy[2] + yy[1])) / 2

This could happen because you have overwritten the name of the function that you attempt to call.

For example:

def x(): print("hello world")
...
x = 10.5
...
x()
---------------------------------------------------------------------------
TypeError Traceback (most recent call last) in 2 print("hello world") 3 x = 10.5
----> 4 x()
TypeError: 'float' object is not callable