How to calculate a logistic sigmoid function in Python?

Question

This is a logistic sigmoid function:

I know x. How can I calculate F(x

Answer 1

Tensorflow includes also a sigmoid function: https://www.tensorflow.org/versions/r1.2/api_docs/python/tf/sigmoid

import tensorflow as tf

sess = tf.InteractiveSession()
x = 0.458
y = tf.sigmoid(x)

u = y.eval()
print(u)
# 0.6125396