Python-сообщество

 from random import randint
mas = []
r=10
mass=[]
mas = [randint(0,9) for i in range(r)]
print(mas)
def med(x):
  arr=[]
  if x==8:
   arr.append(mas[x-1])
   arr.append(mas[x])
   arr.append(mas[0])
   arr.sort()
   mass[x]=arr[1]
  elif x==9:
   arr.append(mas[0])
   arr.append(mas[1])
   arr.append(mas[x])
   arr.sort()
   mass[x]=arr[1]
  else:
   arr.append(mas[x])
   arr.append(mas[x+1])
   arr.append(mas[x+2])
   arr.sort()
   mass[x]=arr[1]
   
   
for k in range(0,10):
  med(k)
print (mass)

 mass[x]=arr[1]

 mass.append(arr[1])