python - IndexError: list assignment index out of range Python 3 这是什么意思，我该如何解决？

Question

elif letterGuess in letterList: # if the letter is one the word characters
  count = 1
  print (letterGuess, ' is in the word!')
  for n in letterList:
      if n == letterGuess: # replaces the dashes with letters
          dash[count - 1] = letterGuess # takes the dash in position and replaces
      count += 1
  count = 0

这是hangman的一些代码的一部分。它说错误在行内：

dash[count - 1] = letterGuess

Answer 1

Dash could only be of length 0 or not iterable.Print dash and cout derectly befor the line that causes the eror.

Answer 2

这意味着count大于 的长度dash。由于我们不知道dash应该包含什么，所以很难说更多。