Tkinter StringVar发送邮件错误SMTPlib

Question

我正在制作一个Tkinter应用程序来发送一封简短的电子邮件。

代码全：

from Tkinter import * 
from smtplib import * 
from time import sleep 
root=Tk() 
root.wm_title("Gmail short message sender") 

w = 500 # width for the Tk root 
h = 500 # height for the Tk root 

# get screen width and height 
ws = root.winfo_screenwidth() # width of the screen 
hs = root.winfo_screenheight() # height of the screen 

# calculate x and y coordinates for the Tk root window 
x = (ws/2) - (w/2) 
y = (hs/2) - (h/2) 

# set the dimensions of the screen 
# and where it is placed 
root.geometry('%dx%d+%d+%d' % (w, h, x, y)) 

def send(): 
    e1_var.get() 
    e2_var.get() 
    e3_var.get() 
    try: 
     smtpObj = SMTP('smtp.gmail.com', "587") 
     smtpObj.ehlo() 
     smtpObj.starttls() 
     smtpObj.ehlo() 
     smtpObj.login("123@gmail.com", "password") 
     smtpObj.sendmail(sender1, receivers1, msg1) 
     l1=Label(text="Sent").grid() 
     sleep(1) 
     l1.destroy() 
    except SMTPException: 
     l2=Label(text="Error").grid() 
     raise 



e1_var=StringVar() 
e2_var=StringVar() 
e3_var=StringVar() 

sender = e1_var 
receivers = [e2_var] 
msg = e3_var 
sender1 = '%s' % (sender) 
receivers1 = '[%s]'% (receivers) 
msg1 = '%s' % (msg) 

e1=Entry(root, textvariable=e1_var).grid() 
e2=Entry(root, textvariable=e2_var).grid() 
e3=Entry(root, textvariable=e3_var).grid() 
b1=Button(text="Send", command=send).grid() 

root.mainloop() 

问题：

问题是与我StringVar实例。首先，StringVar实例正在绘制此错误。

Exception in Tkinter callback 
Traceback (most recent call last): 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py", line 1536, in __call__ 
    return self.func(*args) 
    File "Desktop/Python Scripts/Email.py", line 32, in send 
    smtpObj.sendmail(sender1, receivers1, msg1) 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/smtplib.py", line 724, in sendmail 
    esmtp_opts.append("size=%d" % len(msg)) 
AttributeError: StringVar instance has no attribute '__len__' 

但我通过增加这部分解决了这个问题，

sender1 = sender 
receivers1 = receivers 
msg1 = msg 

和不断变化的smtpObj.sendmail(sender, receivers, msg)到smtpObj.sendmail(sender1, receivers1, msg1)。我现在得到这个错误。

Exception in Tkinter callback 
Traceback (most recent call last): 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py", line 1536, in __call__ 
    return self.func(*args) 
    File "Desktop/Python Scripts/Email.py", line 32, in send 
    smtpObj.sendmail(sender1, receivers1, msg1) 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/smtplib.py", line 742, in sendmail 
    raise SMTPRecipientsRefused(senderrs) 
SMTPRecipientsRefused: {'[[<Tkinter.StringVar instance at 0x103e8be60>]]': (555, '5.5.2 Syntax error. yi8sm12824416pab.22 - gsmtp')} 

这是一个语法错误，因为引号？如果是这样，我该如何解决第一个错误？

Answer 1

这（和喜欢它的其它代码）不正确：

sender = e1_var 
receivers = [e2_var] 
msg = e3_var 

你需要把它改成这样：

sender = e1_var.get() 
receivers = [e2_var.get()] 
msg = e3_var.get() 

这不是你的唯一的问题，虽然。此代码在用户有机会输入任何内容之前运行，因此结果将全部为空字符串。您需要等待拨打.get()方法，直到您准备好使用它们（其中，好奇地，您已经在send之内）。