从文件读取时出现此错误:
line 70 in main: score += points
TypeError: unsupported operand type(s) for +=: 'int' and 'str'
我在文件中取一个整数并将其添加到变量score
。从文件的读取在next_line
函数中完成,然后在next_block
函数中调用该函数。
我试过把score
和points
都转换成一个似乎不起作用的整数。
程序代码如下:
# 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.")
您正在尝试添加
int
和str
points
是一个字符串,因为您是从文件中读取的:但是
score
是一个整数:不能将字符串添加到整数。如果从文件中读取的值表示整数,则需要首先使用
int()
对其进行转换:当接收到错误消息时,它通常可以显示有关问题的有用信息…
TypeError: unsupported operand type(s) for +=: 'int' and 'str'
基本上是说,不能将+=
运算符(可以简化为+
)与它接收的两种不同类型的对象(字符串和整数,在您的情况下)一起使用。您的
points
对象是整数类型,而您的score
是字符串(因为它是从文件中读取的)。若要更正此问题,必须将字符串转换为整数,以便与另一个整数相加,可以使用
int()
函数完成此操作。tl;dr:
type(1)
!=type('1')
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