Question

所以我做了一些功课，而且我有点难过，这项任务是创建一个程序，根据你的名字和你开始上学的那一年制作一个电子邮件地址，但对于一些人来说我无法收到生成电子邮件的原因我继续将＆＃34; String索引超出范围＆＃34;错误。以下是信息：

Traceback (most recent call last):
  File "C:/Users/simps/Desktop/email.py", line 58, in <module>
    emailOutput = Text(Point(200,350), fst_name[0] + lst_name + YEAR + "@student.kathycollege.edu")
IndexError: string index out of range
Here is my code:

# a graphical program that creates a student email adress
from graphics import *
import math
#setting up the window
win = GraphWin("email",400,400)
win.setBackground("yellow")
#setting up the input
instructions = Text(Point(160,50), "For your email, enter your first and last name,\n and the year you are starting school.")
instructions.draw(win)
fstName = Text(Point(100,100),"What is your first name?: ")
fstName.draw(win)
fstNameInput = Entry(Point(260,100), 10)
fstNameInput.draw(win)
lstName = Text(Point(100,150), "what is your last name?: ")
lstName.draw(win)
lstNameInput = Entry(Point(260,150), 15)
lstNameInput.draw(win)
year = Text(Point(130,200), "What year are you starting school?: ")
year.draw(win)
yearInput = Entry(Point(280,200), 4)
yearInput.draw(win)
#Line break
linBreak = Text(Point(200,289), "=======================================")
linBreak.draw(win)
#Output
email = Text(Point(50,315), "Your email is: ")
email.draw(win)
emailOutput = Entry(Point(200,340), 50)
emailOutput.draw(win)
#setting up The process
fst_name = fstNameInput.getText()
lst_name = lstNameInput.getText()
YEAR = yearInput.getText()
#Button
button = Rectangle(Point(130,250),Point(210,279))
button.draw(win)
buttonCenter = button.getCenter()
buttonText = Text(buttonCenter, "Enter")
buttonText.draw(win)
#button function (got help for this on stack overflow)
def inside(point, rectangle):


    ll = rectangle.getP1()
    ur = rectangle.getP2()  

    return ll.getX() < point.getX() < ur.getX() and ll.getY() < point.getY() < ur.getY()


while True:
    click = win.getMouse()

    if click is None:
        emailOutput.setText("")
    elif inside(click, button):
        emailOutput.setText(fst_name[0] + lst_name + YEAR + "@student.kathycollege.edu")
        break;

Answer 1

错误消息会有所帮助。但基于我的眼球，错误可能发生在最后一行：

if (x == null || y == null) return x == null ? y == null ? new T[0] : y : x;

当emailOutput.setText(fst_name[0] + lst_name + YEAR + "@student.kathycollege.edu")为空时，fst_name会使索引超出范围错误。我不认为你在这里需要fst_name[0]，或者你可能想要单独处理无名字的情况。

Answer 2

我想通了，我不得不将getText变量移动到按钮命令，所以这些只会在我点击按钮后发生

我不断收到错误＆＃34;字符串索引超出范围＆＃34;

2 个答案: