python随机数分布random测试

因为概率问题，所以需要测试一下python/' target='_blank'>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 randomimport 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。

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