Question

下面是我目前为简单的Caesar密码程序编写的代码，我在尝试将编码数据输出到图形窗口时遇到问题。

该程序运行正常。但是屏幕上显示的唯一输出是编码消息的第一个字母，我需要整个编码消息出现在图形窗口中。

我认为这可能是我的循环问题，但无法弄明白。我尝试移动循环，但只是重复了第一个字母的两次或三次。

任何帮助都将不胜感激。

from graphics import*

def main():
    win = GraphWin("Caeser Cipher",500,500)
    win.setCoords(0.0,0.0,5.0,5.0)

    Text(Point(2,4.8),"Caesar Ciper").draw(win)

    label1 = Text(Point(1,4),"Please input file:").draw(win)

    inputFileName = Entry(Point(2.5,4,),20)
    inputFileName.draw(win)

    button1 = Text(Point(2.5,3.5),"Open").draw(win)
    Rectangle(Point(2.25,3.3),Point(2.75,3.7)).draw(win)

    label = Text(Point(1,2.5),"Please input step:")
    label.draw(win)
    inputstep = Entry(Point(2.5,2.5),20)
    inputstep.draw(win)


    button2 = Text(Point(2.5,2.0),"Encode").draw(win)
    Rectangle(Point(2.25,1.8),Point(2.75,2.2)).draw(win)

    button3 = Text(Point(4,1),"Save").draw(win)
    Rectangle(Point(3.75,0.8),Point(4.25,1.2)).draw(win)

    button4 = Text(Point(4,0.5),"Quit").draw(win)
    Rectangle(Point(3.75,0.3),Point(4.25,0.7)).draw(win)

    output2 = Text(Point(2.5,1.5),'  ')
    output2.setTextColor('blue')
    output2.draw(win)



    while True:
        P = win.getMouse()        

        if(P.getX()>2.25 and P.getX()<2.75 and P.getY()>3.3 and P.getY()<3.7):
            fnamein = inputFileName.getText()
            infile = open(fnamein, encoding='utf-16', mode='r')
            content = infile.read()
            output = Text(Point(2.5,3),100)
            output.setText(content)
            output.setTextColor('red')
            output.draw(win)
            #infile.close()

        if(P.getX()>2.25 and P.getX()<2.7 and P.getY()>1.8 and P.getY()<2.2):
            content.strip()
            words = content.split()
            inputstep1 = inputstep.getText()
            #print(inputstep1)

            encodedcontent = ' '
            for numStr in content:
                codeNum = ord(numStr)
                #print(codeNum)
                encodedcontent = chr(codeNum-eval(inputstep1))
                encodedcontent_ascii = ord(numStr)-int(inputstep1)
                #print(encodedcontent)
                #encodedcontent = encodedcontent + ''

                print(encodedcontent)

                if(encodedcontent_ascii)<ord('a'):
                    encodedcontent_ascii = encodedcontent_ascii + 26
                    #print(encodedcontent_ascii)
                '''if str.isalpha(encodedcontent):
                    encodedcontent = encodedcontent + chr(encodedcontent_ascii)
                else:
                    label.setTextColor('red')'''
                encodedcontent = encodedcontent + chr(encodedcontent_ascii)
                output2.setText(encodedcontent)


        if(P.getX()>3.75 and P.getX()<4.25 and P.getY()>0.8 and P.getY()<1.2):
            fnameout = 'encrypt.txt'
            data = encodedcontent
            outfile = open(fnameout,encoding='utf-16',mode='w')
            outfile.write(data)
            outfile.close()

        if(P.getX()>3.75 and P.getX()<4.25 and P.getY()>0.3 and P.getY()<0.7):
            win.close()



main()

Answer 1

我认为问题在于这个循环：

encodedcontent = ' ' # initialise
for numStr in content:
    ...
    encodedcontent  = chr(codeNum-eval(inputstep1)) # overwrite
    ...   
    encodedcontent = encodedcontent + chr(encodedcontent_ascii) # add

encodedcontent最多只能是两个字符，大概是你想要构建整个字符串。

更一般地说，将所有代码放在一个地方会使调试变得困难。我建议把它分成更小的功能;至少，将字符串的加密与用户界面分开。

在图形窗口中输出字符串数据

1 个答案: