测验分数转换成百分比

Question

还有其他方法吗？在结果框中，我想将变量总计转换为百分比。我试图将总变量设为百分比，但它被定义为全局变量。这是我的代码。请看标记框。我试图划分 str(total)/2*100 但不能。

import Tkinter
import tkMessageBox

    total = 0
    EasyBox1 = Tkinter.Tk()
    EasyBox1.geometry("250x200")
    EasyBox1.title("Quesion 1")

    EasyBox2 = Tkinter.Tk()
    EasyBox2.geometry("250x200")
    EasyBox2.title("Quesion 2")

    ResultBox = Tkinter.Tk()
    ResultBox.geometry("320x260")
    ResultBox.title("Results")

    def next1():
        global total
        if not answr1.get(): tkMessageBox.showerror('no answer')
        elif int(answr1.get()) == 8: total += 1
        print "total after 1:",total
        EasyBox1.withdraw()
        EasyBox2.deiconify()

    def mark():
        global total
        if not answr2.get(): tkMessageBox.showerror('no answer')
        elif answr2.get() in ["B", "b"]: total += 1
        print "total after 2:", total
        EasyBox2.withdraw()
        LabelName5 = Tkinter.Label(ResultBox, text="Marks : " + (str(total))/2*100, font=("Impact",20))
        LabelName5.grid(row=2,column=0)
        ResultBox.deiconify()

    # window 2
    Tkinter.Label (EasyBox1, text="answer:").pack()
    answr1 = Tkinter.Entry (EasyBox1)
    answr1.pack()
    LabelName2 = Tkinter.Label (EasyBox1, text="State the number of edges in a cube")
    LabelName2.grid(row=1,column=0)
    LabelName2.pack()

    # window 2
    Tkinter.Label (EasyBox2, text="answer:").pack()
    answr2 = Tkinter.Entry (EasyBox2)
    answr2.pack()
    LabelName2 = Tkinter.Label (EasyBox2, text="What is the place value of the digit 4 in 76421?")
    LabelName2.grid(row=1,column=0)
    LabelName2.pack()
    LabelName2 = Tkinter.Label (EasyBox2, text="A.Thousands B.Hundreds C.Ones D.Tens")
    LabelName2.grid(row=1,column=0)
    LabelName2.pack()

    # hide windows
    EasyBox2.withdraw()
    ResultBox.withdraw()

    Tkinter.Button(EasyBox1, text="Next", command=next1).pack()
    Tkinter.Button(EasyBox2, text="result", command=mark).pack()
    EasyBox1.mainloop()

Answer 1

您试图将一个数字转换为一个字符串，然后将其除以 100。您可以修改一个变量，无论它是局部变量还是全局变量。

我认为您应该使用格式字符串。 %% 打印 % 符号。而 %.2f 将浮点数 (f) 转换为具有 2 个小数位 (.2) 的字符串。

text="Marks : %.2f %%" % (total/2*100.0)