python

超轻量级php框架startmvc

python随机数分布random均匀分布实例

更新时间:2020-08-10 16:54:01 作者:startmvc
因为概率问题,所以需要测试一下python的随机数分布。到底是平均(均匀)分布,还是正态

因为概率问题,所以需要测试一下python的随机数分布。到底是平均(均匀)分布,还是正态(高斯)分布。

测试代码如下:


#! /usr/bin/env python
#coding=utf-8
 
 
# =================================
# Describe : 测试random随机数分布
# D&P Author By: 常成功
# Create Date: 2017/10/07
# Modify Date: 2017/10/20
# (C) 2012-2017 All rights reserved
# =================================
 
 
import random
import time
 
def test_rnd():
 st_tm = time.time()
 j = 0
 num = 0
 the_list = [1, 2, 3, 4]
 # 计数字典
 temp_dic = {1: 0, 2: 0, 3: 0, 4: 0}
 while 1:
 x = random.choice(the_list)
 temp_dic[x] += 1
 j += 1
 # 跑一千万次
 if j >= 10000000:
 break
 ed_tm = time.time()
 print "Test random.choice()---------------------------:"
 print "loop num: ", j
 print "take time: ", ed_tm-st_tm
 print "temp_dic :", temp_dic
 
 print "Test random.randint()---------------------------:"
 st_tm = time.time()
 j = 0
 num = 0
 # 计数字典
 temp_dic = {1: 0, 2: 0, 3: 0, 4: 0}
 while 1:
 x = random.randint(1, 4)
 temp_dic[x] += 1
 j += 1
 # 跑一千万次
 if j >= 10000000:
 break
 ed_tm = time.time()
 print "loop num: ", j
 print "take time: ", ed_tm-st_tm
 print "temp_dic :", temp_dic
 
 
if __name__ == '__main__':
 test_rnd()

测试结果:


Test random.choice()---------------------------:
loop num: 10000000
take time: 5.86599993706
temp_dic : {1: 2501333, 2: 2500117, 3: 2499406, 4: 2499144}
Test random.randint()---------------------------:
loop num: 10000000
take time: 12.493999958
temp_dic : {1: 2497732, 2: 2501411, 3: 2499372, 4: 2501485}

结果说明:

平均(均匀)分布。

以上这篇python随机数分布random均匀分布实例就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持脚本之家。

python 随机数 random 均匀分布