我對字符串和整數有些困惑，並且不斷收到此錯誤：TypeError：列表索引必須是整數或切片，而不是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

您的代碼唯一的語法問題是您無法for i in len(nameList)做for i in len(nameList)如果要循環一定次數，則必須使用range() 。 如果將最后一部分更改為：

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!")

Answer 2

len(nameList)返回一個整數，您應該改為調用range(len(nameList)) 。 但是，如果您這樣編寫代碼，則代碼將更加簡潔：

print("You may invite up to six people to your party.")

name_list = []
for current_name in range(6):
    name = input("Enter invitee's name (or just press enter to finish): ")
    if not name:
        break
    name_list.append(name)

for invitee in name_list:
    print(invitee + ", please attend our party this Saturday!")