python 牛顿迭代小游戏

def f(x):return x**2 - ndef fd(x):return 2*xdef newton(f, fd, k):x = n/2for i in range(100):g = x - f(x)/fd(x)if abs(x - g) < k:print ibreakx = gprint i, xwhile True:try:n = float(input("please input a number:"))newton(f, fd, 1e-10)except NameError:break