TypeError：+ =不支持的操作數類型：“ int”和“ str”

Question

從文件讀取時出現此錯誤：

line 70 in main: score += points
TypeError: unsupported operand type(s) for +=: 'int' and 'str'

我在文件中取一個整數，並將其添加到變量score 。 從文件讀取是在next_line函數中完成的，然后在next_block函數中調用。

我嘗試將score和points都轉換為似乎不起作用的整數。

這是程序代碼：

# Trivia Challenge
# Trivia game that reads a plain text file

import sys

def open_file(file_name, mode):
    """Open a file."""
    try:
        the_file = open(file_name, mode)
    except IOError as e:
        print("Unable to open the file", file_name, "Ending program.\n",e)
        input("\n\nPress the enter key to exit.")
        sys.exit()
    else:
        return the_file

def next_line(the_file):
    """Return next line from the trivia file, formatted."""
    line = the_file.readline()
    line = line.replace("/", "\n")
    return line

def next_block(the_file):
    """Return the next block of data from the trivia file."""
    category = next_line(the_file)

    question = next_line(the_file)

    answers = []
    for i in range(4):
        answers.append(next_line(the_file))

    correct = next_line(the_file)
    if correct:
        correct = correct[0]

    explanation = next_line(the_file)

    points = next_line(the_file)

    return category, question, answers, correct, explanation, points

def welcome(title):
    """Welcome the player and get his/her name."""
    print("\t\tWelcome to Trivia Challenge!\n")
    print("\t\t", title, "\n")

def main():
    trivia_file = open_file("trivia.txt", "r")
    title = next_line(trivia_file)
    welcome(title)
    score = 0

    # get first block
    category, question, answers, correct, explanation, points = next_block(trivia_file)
    while category:
        # ask a question
        print(category)
        print(question)
        for i in range(4):
            print("\t", i + 1, "-", answers[i])

        # get answer
        answer = input("What's your answer?: ")

        # check answer
        if answer == correct:
            print("\nRight!", end= " ")
            score += points
        else:
            print("\nWrong.", end= " ")
        print(explanation)
        print("Score:", score, "\n\n")

        # get next block
        category, question, answers, correct, explanation, points = next_block(trivia_file)

    trivia_file.close()

    print("That was the last question!")
    print("Your final score is", score)

main()
input("\n\nPress the enter key to exit.")

Answer 1

points是一個字符串，因為您是從文件中讀取的：

points = next_line(the_file)

但score是整數：

score = 0

您不能將字符串添加到整數。 如果從文件中讀取的值表示整數，則需要先使用int()對其進行轉換：

score += int(points)

Answer 2

收到錯誤消息時，它通常可以顯示有關問題的有用信息...
TypeError: unsupported operand type(s) for +=: 'int' and 'str'基本上是說不能對接收到的兩種不同類型的對象使用+=運算符（可以簡化為+ ）字符串和整數（在您的情況下）。
您的points對象是整數類型，而您的score是一個字符串（因為它是從文件中讀取的）。

若要更正此問題，您必須將字符串轉換為整數，並允許將其與其他整數求和，這可以使用int()函數完成。

tl; dr： type(1) ！= type('1')

Answer 3

您正在嘗試添加int和str

score = int(score)
score += points