Python隨機數循環

Question

嘿，我有一個課堂練習，我堅持，並會感謝任何幫助。該程序應該隨機選擇一個1-5之間的數字並循環，直到所有數字被選中。然後它應該重複約100次，以獲得平均得到所有五個數字所需的次數。我知道如何使用random.int，只是不知道如何編寫一個循環，當所有5個數字都被選中時它會中斷。任何形式的幫助都會很棒。謝謝

Answer 1

這將做到這一點：

from random import randint 
a = [] 
for _ in range(100): 
    b = 0 
    c = set() 
    while len(c) < 5: 
     c.add(randint(1, 5)) 
     b += 1 
    a.append(b) 
d = round(sum(a)/len(a)) 
print("{}\nAverage loops: {}".format(c, d)) 

記錄在案版本：

# Import the `randint` function from `random`. 
from random import randint 
# This will hold the results that will later be used to calculate the average. 
a = [] 
# This loops 100 times (to get data for a calculation of the average). 
for _ in range(100): 
    # This will be the number of times the while-loop loops. 
    b = 0 
    # This is a set to hold the choices of `random.randint`. 
    # When it reaches 5 items, all numbers from 1-5 have been found. 
    c = set() 
    # Loop while the length of the set is less than 5. 
    while len(c) < 5: 
     # Add a new random number to the set, 
     # If the number is already there, nothing happens. 
     c.add(randint(1, 5)) 
     # Record a completed iteration of the while-loop. 
     b += 1 
    # Add the number of while-loop loops to `a`. 
    a.append(b) 
# The average is calculated by dividing the sum of `a` by the length of `a`. 
# It is then rounded to the nearest integer. 
d = round(sum(a)/len(a)) 
# Print the results. 
print("{}\nAverage loops: {}".format(c, d)) 

輸出示例：

{1, 2, 3, 4, 5} 
Average loops: 12 

{1, 2, 3, 4, 5} 
Average loops: 10 

{1, 2, 3, 4, 5} 
Average loops: 9 

Answer 2

我建議你使用Set。每次達到1-5之間的值時，將其放入您的設置中，然後當設置的大小爲5時，打破循環。

Answer 3

我只是做一個while循環，它產生一個1-5之間的隨機數，直到它得到第一個數字t，記錄它所花費的嘗試次數，記錄它所花費的嘗試次數。與下一個數字，當你完成後，找到平均花了多少次嘗試。

例子：

total = 0 
for i in range(100): 
    for n in range(1,6): 
     generatedNum = 0 
     while generatedNum != n: 
      #generate random number 
      total += 1 
print (total/100) 

Answer 4

這裏是另一種方式，我們可以使用：導致

import random 

total = {1:0,2:0,3:0,4:0,5:0} 

for k in xrange(100):       #outter loop 
    trial = {} 
    n = 0          #counter 
    while n<5: 
     sample = random.randint(1,5)   #sample 
     try: 
      trial[sample] += 1 
     except: 
      n += 1 
      trial[sample] = 1 
    for i in xrange(1,6):      #accumulate the results 
     total[i] += trial[i] 

：

>>> total 
{1: 221, 2: 255, 3: 246, 4: 213, 5: 243}