Python求解平方根的代码怎么写？

Question

Python求解平方根的代码怎么写？

Answer 1

How to write the code to solve the square root in Python? -PHP Chinese website Q&A-How to write the code to solve the square root in Python? -PHP Chinese website Q&A

Let’s take a look and learn.

Answer 2

主要通过SICP的内容改写而来。基于newton method求解平方根。代码如下：

#!/usr/bin/python
def sqrt_iter(guess,x):
  if(good_enough(guess, x)):
    print guess
  else:
    sqrt_iter(improve(guess, x),x)
def improve(guess, x):
  return average(guess, x/guess)
def average(x,y):
   return (x+y)/2
def good_enough(guess,x):
  if(abs(guess * guess -x) < 0.0001):
    return True
  else:
    return False
def sqrt_oliver(x):
  sqrt_iter(1.0,x)
sqrt_oliver(5)