无法隐式将 int 对象转换为 str

Question

下面是我的代码的简化快照：

def getExamPoints(examPoints):
    totalexamPoints = 0 
    return totalexamPoints

def getHomeworkPoints(hwPoints):
    totalhwPoints = 0
    return totalhwPoints

def getProjectPoints(projectPoints):
    totalprojectPoints = 0
    return avgtotalprojectPoints

def computeGrade(computeGrade):
    computeGrade = 1
    return computeGrade

def main ( ):

    gradeReport = "\n\nStudent\t Score\tGrade\n=====================\n"

    studentName = input ("Enter the next student's name, or 'quit' when done: ")

    while studentName != "quit":

        examPoints = getExamPoints(studentName)
        hwPoints = getHomeworkPoints(studentName)
        projectPoints = getProjectPoints(studentName)

        studentScore = examPoints + hwPoints + projectPoints

        studentGrade = computeGrade (studentScore)

        gradeReport = gradeReport + "\n" + studentName + "\t%6.1f"%studentScore + "\t" + studentGrade** 

main ( ) # Start program

在最后一行的gradeReport赋值中得到一个错误，该行说“无法隐式地将int对象转换为str”。为什么会这样？在

Answer 1

这是有问题的线路：

gradeReport = gradeReport + "\n" + studentName + "\t%6.1f"%studentScore+"\t"+studentGrad

您应该使用字符串格式，而不是简单地将字符串和整数相加（这是一个错误）。一种方法是：

^{pr2}$

还有其他方法，但是由于您已经使用了%格式，所以我在这里继续

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在Python中，"5" + 5是一个错误，因为它是不明确的。它应该返回"55"？10？Python要求您明确地说明这一点，而不是做出假设并有一半的时间是错误的。在