我就废话不多说了,大家还是直接看代码吧~
- import time
- import math
- import numpy as np
- def timeit1():
- s = time.time()
- for i in range(750000):
- z=i**.5
- print ("Took %f seconds" % (time.time() - s))
- def timeit2(arg=math.sqrt):
- s = time.time()
- for i in range(750000):
- z=arg(i)
- print ("Took %f seconds" % (time.time() - s))
- def timeit3(arg=np.sqrt):
- s = time.time()
- for i in range(750000):
- z=arg(i)
- print ("Took %f seconds" % (time.time() - s))
- def timeit4():
- s = time.time()
- for i in range(750000):
- z=math.pow(i,.5)
- print ("Took %f seconds" % (time.time() - s))
- timeit1()
- timeit2()
- timeit3()
- timeit4()
- Took 0.152364 seconds
- Took 0.061580 seconds
- Took 1.016529 seconds
- Took 0.215403 seconds
补充:Python笔记-开根号的几种方式
前言
使用Python中的自带库math、自带函数pow和自带库cmath来对数字进行开根号运算
方法一
使用:math.sqrt(数字)
- import math
- n = int(input('数字:'))
- x = math.sqrt(n)
- print(x)
- print(type(x)) #开根号后的类型为float
方法二
使用:pow(数字,次方)
- n = int(input('数字:'))
- x = pow(n,0.5)
- print(x)
- print(type(x)) #开根号后的类型为float
方法三
使用:cmath.sqrt(数字)
该方法多用于复数、负数的开方运算
- import cmath
- n = int(input('数字: '))
- x = cmath.sqrt(n)
- print(x)
- print(type(x)) #类型为complex
以上为个人经验,希望能给大家一个参考,也希望大家多多支持我们。如有错误或未考虑完全的地方,望不吝赐教。
原文链接:https://www.cnblogs.com/MrLJC/p/10106640.html