plus/minus operator for python ±

Question

I am looking for a way to do a plus/minus operation in python 2 or 3. I do not know the command or operator, and I cannot find a command or operator to do this.

Am I

Answer 1

Instead of computing expressions like

s1 = sqrt((125.0 + 10.0*sqrt(19)) / 366.0)
s2 = sqrt((125.0 - 10.0*sqrt(19)) / 366.0)

you could use

pm = numpy.array([+1, -1])
s1, s2 = sqrt((125.0 + pm * 10.0*sqrt(19)) / 366.0)