我是一名新手学生,正在尝试编写一个程序,将原始分数列表转换为字母等级列表。我需要循环、文件打开/关闭、if-elif-else 语句和 2 个函数作为我的分配标准。
我要打开进行测试的文件如下所示:
108
99
0
-1
这是到目前为止的程序:
def convertscore(score):
grade = ""
if score >=101:
print("Score is over 100%. Are you sure this is right?")
grade = "A"
elif score >=90:
grade = "A"
elif score >=80 <=89:
grade = "B"
elif score >=70 <=79:
grade = "C"
elif score >= 60 <=69:
grade = "D"
elif score >=0 <=59:
grade = "F"
elif score < 0:
print("Score cannot be less than zero.")
else:
print("Unable to convert score.")
print(grade)
def main():
print("This program creates a file of letter grades from a file of scores on a 100-point scale.")
print()
#get the file names
infileName = input("What file are the raw scores in? ")
outfileName = input("What file should the letter grades go in? ")
#open the files
infile = open(infileName, 'r')
outfile = open(outfileName, 'w')
#process each line of the output file
for line in infile:
#write to output file
print(convertscore(line), file=outfile)
#close both files
infile.close()
outfile.close()
print()
print("Letter grades were saved to", outfileName)
main()
如果我尝试运行它,我会收到一个类型错误:
Traceback (most recent call last):
File "/Users/xxxx/Documents/convertscore.py", line 54, in <module>
main()
File "/Users/xxxx/Documents/convertscore.py", line 45, in main
print(convertscore(line), file=outfile)
File "/Users/xxxx/Documents/convertscore.py", line 10, in convertscore
if score >=101:
TypeError: '>=' not supported between instances of 'str' and 'int'
convertscore 程序似乎可以自己运行,所以我很困惑。预先感谢您的帮助。