Python'builtin_function_or_method'对象不是可迭代错误

Question

i created this program which will replace a sentence with the words in its position and saves them as a separate file. However when i run it i get this error: Traceback (most recent call last): File , line 12, in Positions = list2.index(word)

here is the code:

UserSentence = input("enter sentence:").lower()
words = UserSentence
words = words.split()
number = 0
list1 = []
list2 = " "

for Position in words:
    if Position not in list1:
        list1.append(Position)
for word in words:
        Positions = list2.index(word)
        list2+=str(Positions+int("1"))
        list2 +=("")
list1str += ";".join(list1)

file = open ("myfile.txt","w")
file.write(sentence)
file.write(list1str)
file.write(list2)
file = open ("myfile.txt", "r")
print (file.read())
file.close()

could someone explain me what mistake i made in my code?

Answer 1

UserSentence = input("enter sentence:").lower()
words = UserSentence
words = words.split() # actually call the function

Without using the parentheses, you are actually assigning the method .split to the variable words , then trying to iterate over it, giving you the error.

Answer 2

You set words = words.split , but you aren't actually calling the method, so instead you are trying to iterate over the reference to that function. Call the method instead with words = words.split()