[python] How can I use "e" (Euler's number) and power operation in python 2.7

How can i write x.append(1-e^(-value1^2/2*value2^2)) in python 2.7?

I don't know how to use power operator and e.

Python's power operator is ** and Euler's number is math.e, so:

 from math import e
 x.append(1-e**(-value1**2/2*value2**2))

Power is ** and e^ is math.exp:

x.append(1 - math.exp(-0.5 * (value1*value2)**2))

math.e or from math import e (= 2.718281…)

The two expressions math.exp(x) and e**x are equivalent however:
Return e raised to the power x, where e = 2.718281… is the base of natural logarithms. This is usually more accurate than math.e ** x or pow(math.e, x). docs.python

for power use ** (3**2 = 9), not " ^ "
" ^ " is a bitwise XOR operator (& and, | or), it works logicaly with bits. So for example 10^4=14 (maybe unexpectedly) ? consider the bitwise depiction:

(0000 1010 ^ 0000 0100 = 0000 1110) programiz

Just saying: numpy has this too. So no need to import math if you already did import numpy as np:

>>> np.exp(1)
2.718281828459045