我不想返回None，該怎么辦？
import math
def quadratic_equation(a, b, c):
? ?h=b*b-4*a*c
? ?if h>= 0:
? ? ? ?return (-b-math.sqrt(h))/(2*a),(-b+math.sqrt(h))/(2*a)
? ?else:
? ? ? ?print '沒有實數解'
print quadratic_equation(2, 3, 0)
print quadratic_equation(1, 0, 5)
2017-07-22
else :?
? ? return ''