[Python知识库]python计算圆周率

一、题目

使用python计算圆周率，并显示计算进度条。

二、代码

from random import random
from math import sqrt
import time

DARTS = 100000000  #抛DARTS个点
hits = 0.0      #圆内的点
for i in range(1, DARTS+1):
    temp=( i / DARTS );
    a = '*' * int(temp*100);
    b = '.' * int(  ((DARTS - i)/DARTS)*100 );
    c = temp * 100;
    x, y = random(), random()
    dist = sqrt(x ** 2 + y ** 2)    #随机生成的点到单位圆之间的距离dist
    if dist <= 1.0:
        hits = hits + 1
    pi = 4 * (hits / DARTS)
    print("\r{:^3.0f}%[{}->{}]，运行时间是: {:5.5}s".format(c, a, b, time.process_time()), end='')
pi = 4 * (hits/DARTS)               #计算出来的π
print("\nPi值是{}.".format(pi))

"""
==========================
@auther:JingDe
@Date:2022/3/21 0:32
@email:z18691396932@163.com
@IDE:PyCharm
==========================
"""

三、运行结果

18 %[******************->.................................................................................]，运行时间是: 137.02s

D:\Software\Anaconda3\python.exe D:/Desktop/PyCharmWork/Demo/work2022-03-21/pi.py
100%[****************************************************************************************************->]，运行时间是: 7.6094s
Pi值是3.141408