How to calculate a sigmoid function in Python?

Question

This is a sigmoid function:

I know x. How can I calculate F(x) in Python now?

Let's say x = 0.458.

F(x) = ?

Answer 1

This should do it:

import math

def sigmoid(x):
  return 1 / (1 + math.exp(-x))

And testing it:

>>> sidmoid(0.458)
0.61253961344091512

Answer 2

another way

>>> def sigmoid(x):
...     return 1 /(1+(math.e**-x))
...
>>> sigmoid(0.458)