尝试运行测试以查看每个性别需要多少 children，但数组无法正常工作？

Question

我是运行 class 的一些代码，但我不知道该怎么做，我提交了作业，但如果我不知道最后该怎么做，这对我没有帮助.这是我运行尝试跟踪这些测试的代码。这个想法是看看在每个性别至少有 1 child 之前需要多少 children。然后程序应该将其存储到列表值 boysandgirls_stats[x]。问题是它不会存储所有测试。它只记录 100 个中的 40 个或 1000 个中的 200 个。我不知道这些其他测试存储在哪里。 stdarray 是我们必须从我们正在使用的书中使用的东西。它跟踪测试的方式类似于 python 中的列表，但我没有很好地解释它。谢谢！

import stdio
import random
import sys
import stdarray

numTrials = int(sys.argv[1])

boysandgirls_stats = stdarray.create1D(4, 0)
boys = 0
girls = 0
children = 0
totalChildren = 0


for x in range(numTrials):  # Simulation to determine sex
    childType = random.randint(0, 1)
    if childType == 0:
        boys += 1
        children += 1
        totalChildren += 1
    else:
        girls += 1
        children += 1
        totalChildren += 1
    for x in range(numTrials):  # Keeps track of amount of children needed
        if (boys >= 1) and (girls >= 1):
            if children <= 5:
                boysandgirls_stats[children - 2] += 1
                boys = 0
                girls = 0
                children = 0
            else:
                boysandgirls_stats[3] += 1
                boys = 0
                girls = 0
                children = 0
avgChildren = totalChildren / numTrials  # Calculation for average children
stdio.writeln('Avg # of children: ' + str(avgChildren))
for x in range(len(boysandgirls_stats)):
    stdio.writeln(str(x+2) + ' children ' + str(boysandgirls_stats[x]))

Answer 1

import sys
import random

## let's put the test inside a function:
def child_test():
  girl = False
  boy  = False
  total_children = 0
  while not (boy and girl): 
    total_children += 1
    if random.randint(0, 1) == 0:
      boy = True
    else:
      girl = True
  return total_children


## now the statistics:
# get the number of trials from user command:
num_trials = int(sys.argv[1])

# for every number of children, log the associated number of tests:
total = 0
indexed_count = {}
for i in range(num_trials):
  num_children = child_test()
  if num_children not in indexed_count:
    indexed_count[num_children] = 0
  indexed_count[num_children] += 1
  total += num_children

# calculate and output the average:
average = total / num_trials
print(f'average is : {average}')

# show tries per number of children
sorted_indexed_count = sorted(indexed_count.items(), key = lambda x: x[1], reverse = True)
for t in sorted_indexed_count:
  print(f'  {t[0]} children : {t[1]} tests')

输出：

$ python3 so.py 100000
average is : 3.00812
  2 children : 49702 tests
  3 children : 25238 tests
  4 children : 12401 tests
  5 children : 6314 tests
  6 children : 3159 tests
  7 children : 1528 tests
  8 children : 840 tests
  9 children : 410 tests
  10 children : 214 tests
  11 children : 99 tests
  12 children : 53 tests
  13 children : 18 tests
  14 children : 10 tests
  15 children : 6 tests
  16 children : 6 tests
  18 children : 1 tests
  17 children : 1 tests

尝试运行测试以查看每个性别需要多少 children，但数组无法正常工作？

Trying to run a test to see how many children it takes to have one of each sex but the array is not working properly?

python

arrays

testing

list

probability

尝试 运行 测试以查看每个性别需要多少 children，但数组无法正常工作？

Trying to run a test to see how many children it takes to have one of each sex but the array is not working properly?

python

arrays

testing

list

probability

尝试运行测试以查看每个性别需要多少 children，但数组无法正常工作？