我想找出这个班的平均总成绩。我运行我的程序,但不断得到“TypeError:不支持的操作数类型+:'int'和'str'”。你知道吗
def newRecord(students,tests):
students = int(input('How many students are in your class? '))
tests = int(input('How many tests have you given? '))
record = []
for i in range(students):
rec_line = []
for j in range(tests+1):
rec_line.append(0)
record.append(rec_line)
print('record:',record)
print('modified record:',record)
for A in range (students):
record[A][0] = input('Please enter student {} name '.format(A+1))
for B in range (1, tests+1):
record[A][B] = input ('Please enter test score {} '.format(B))
print (record)
total= float(sum(record))/ len(record)
print ('Average is: ',total )
每个测试结果都需要转换成
int
或float
,以便对它们执行数学函数。在上面的例子中,你也在称呼学生的名字,当你试图计算一个“平均数”时,这个名字会抛出一个错误。你知道吗用法示例:
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