Question

Numbers = []
QN = input("what are the numbers")
Numbers.append(QN)

def Median():
  median = sorted(Numbers)
  print ("Sorted:", median)
Median()

这是我的代码，我正在尝试创建一个程序，在该程序中，用户输入一个数字列表，而不是该程序使用排序功能从最小到最大列出它们。问题在于它没有打印排序列表，而是在打印原始的未排序列表。我无法弄清楚问题，用户输入的数字列表已添加到列表中，但似乎该列表未排序。

Answer 1

sorted函数接受一个列表并对其元素进行排序。所以，

In [2]: sorted([1])                                                                                                                                                                            
Out[2]: [1]

一个元素的列表已被视为已排序，因为一个数字没有顺序。

In [1]: sorted([312,321,213])                                                                                                                                                                  
Out[1]: [213, 312, 321]

这三个被视为数字，并进行了相应的排序。

In [2]: sorted(['312','33','321'])                                                                                                                                                             
Out[2]: ['312', '321', '33']

有被认为是字符串，并按字母顺序按字母顺序

排序

In [3]: sorted('231')                                                                                                                                                                          
Out[3]: ['1', '2', '3']

字符串也被视为字符列表，因此字符按字母顺序排序。

QN = input("what are the numbers")

def Median():
  median = sorted(QN)
  print ("Sorted:", median)
Median()

这是使当前代码正常工作的方式。

但这可能是您想要做的：

def Median(lst): 
  median = sorted(lst) 
  return median # you have to work on this further to actually calculate the median, this will just return the sorted list.


Numbers = [] 
QN = 'placeholder' # put a placeholder so we can enter the loop 
print('enter your numbers, one number in each line, empty line to end') 
while (QN != ''): 
  QN = input() 
  if (QN != ''): 
    Numbers.append(int(QN)) # make sure you put the int() because you don't want to consider the numbers as strings because in that case they will be sorted alphabetically. 


print ("Sorted:", Median(Numbers))

结果：

enter your numbers, one number in each line, empty line to end
1
32
23
21
24

Sorted: [1, 21, 23, 24, 32]

Answer 2

import time
Numbers = []
A = int(input("how many numbers are in the list"))
time.sleep(.5)
print ("Can you please enter the numbers?")
time.sleep(.3)
for i in range(A):
  data = int(input())
  Numbers.append(data)

def Median():
  median = sorted(Numbers)
  print median
  if A%2 == 0:
    one = int(A/2) - 1  
    two = one + 1
    One = median[one]
    Two = median[two]
    sum = (One + Two)
    Ans = sum/2
    print ("The median is " + str(Ans))
  else:
    one = int(A/2)  
    One = median[one]
    print ("The median is " + str(One))

这似乎有效。这段代码行吗？

排序功能未对用户输入的列表进行排序

2 个答案: