Python IDLE doesn't recognize numpy functions

Question

A very simple thing - I downloaded python 3.8 and installed numpy. Upon making a very basic program that uses a numpy function, I get an error. I captured all the info that I think is relevant for now:

Traceback (most recent call last):
  File "C:/Python/numpytest.py", line 6, in <module>
    a=sigmoid(2)
  File "C:/Python/numpytest.py", line 4, in sigmoid
    return 1/(1+exp(-x))
NameError: name 'exp' is not defined

I'm guessing it isn't even importing numpy but no idea why.

Answer 1

Use np.exp(x) to access Numpy's exp() function.

Otherwise, import Numpy as:

from numpy import *

to use exp() without any prefix.

Answer 2

For example,

import numpy as np
def sigmoid(x):
  return 1/(1+np.exp(-x))
a=sigmoid(2)
print(a)

You need to call the np class then the exp function

Also, it is better to copy the text rather than take a picture of it.