python - 我对字符串和整数有点困惑，而且我一直收到此错误 : TypeError: list indices must be integers or slices, not str

Question

print("You may invite up to six people to your party.")
name = input("Enter invitee's name (or just press enter to finish): ")
nameList = ["","","","","",""]
currentName = 0

while name != "":
    if currentName > 5:
        break #If more than 6 names are input, while loop ends.
    else:
        nameList[currentName] = name
        name = input("Enter invitee's name (or just press enter to finish): ")
        currentName = currentName + 1

for i in len(nameList):
    invitee = nameList[i]

    print(invitee + ", please attend our party this Saturday!")

Answer 1

你的代码唯一的语法问题是你不能做 for i in len(nameList)，如果你想，你必须使用 range()循环一定次数。如果您将最后一部分更改为:

for i in range(len(nameList)): # range(5) makes a list like [0, 1, 2, 3, 4]
    invitee = nameList[i]

    print(invitee + ", please attend our party this Saturday!")