import math
min = 50
max = 100
def grade(points):
if points < min:
return str(5.0)
if points >= max:
return str(1.0)
return str(
round(1.0 + (9 - math.floor((points - min) /
(max - min) * 10)) / 3, 1))
grade(95)
'1.0'