python中根号怎么表示

import mathmath.sqrt( x )

#!/usr/bin/pythonimport math   # This will import math moduleprint "math.sqrt(100) : ", math.sqrt(100)print "math.sqrt(7) : ", math.sqrt(7)print "math.sqrt(math.pi) : ", math.sqrt(math.pi)

math.sqrt(100) :  10.0math.sqrt(7) :  2.64575131106math.sqrt(math.pi) :  1.77245385091