python - 出现类型错误，但我找不到原因

Question

这段代码以前可以工作，但现在给我带来了问题。

def stringsAreFun():
string1 = input("Enter a String you want to modify: ") #stores the user imput to string1 variable
stringLength = len(string1) #stores stringlen to a variable for future, repitive calls
print("The length is ", stringLength)
print("The first character is " + string1[0]
+ " and the last character is " + string1[stringLength - 1])
listString = list[string1]
if stringLength >= 6:
    #creates a list of characters from string1 because strings are immuntable in python
    #http://www.tutorialspoint.com/python/python_lists.htm
    listString[stringLength - 1] = 'C'
    listString[stringLength - 2] = 'B'
    listString[stringLength - 3] = 'A'
    print(''.join(listString)) #joins the list(x) into a string to be printed
    #http://www.tutorialspoint.com/python/string_join.htm
if stringLength >= 6:
    listString[0] = 'X'
    listString[1] = 'Y'
    listString[2] = 'Z'
    print(''.join(listString))

if stringLength >= 2 & stringLength <= 5:
    listString[0] = '1'
    print(''.join(listString))
if stringLength >= 2 & stringLength <= 5:
    listString[stringLength - 1] = '0'
    print(''.join(listString))

if stringLength % 2 == 0:
    print("The length of the string is an even number!")

else:
    print("The length of the string is an odd number")

我得到这个输出:

TypeError: 'type' object is not subscriptable

Answer 1

这一行:

listString = list[string1]

没有做你想做的事。

listString = list(string1)