AttributeError：條目實例沒有屬性'__len__'

Question

我對Python很新，我一直在玩Tkinter和requests來嘗試創建一個簡單的程序，可以登錄到我的Web應用程序。我已經收到以下錯誤：

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 1410, in __call__ 
    return self.func(*args) 
    File "test.py", line 35, in login 
    c.post('http://fruro.com/login.php', data=self.payload) 
    File "/Users/Peter/Desktop/fruroPy/fruro/lib/python2.7/site-packages/requests/sessions.py", line 399, in post 
    return self.request('POST', url, data=data, **kwargs) 
    File "/Users/Peter/Desktop/fruroPy/fruro/lib/python2.7/site-packages/requests/sessions.py", line 343, in request 
    prep = req.prepare() 
    File "/Users/Peter/Desktop/fruroPy/fruro/lib/python2.7/site-packages/requests/models.py", line 222, in prepare 
    p.prepare_body(self.data, self.files) 
    File "/Users/Peter/Desktop/fruroPy/fruro/lib/python2.7/site-packages/requests/models.py", line 375, in prepare_body 
    body = self._encode_params(data) 
    File "/Users/Peter/Desktop/fruroPy/fruro/lib/python2.7/site-packages/requests/models.py", line 81, in _encode_params 
    return urlencode(result, doseq=True) 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib.py", line 1311, in urlencode 
    len(v) 
AttributeError: Entry instance has no attribute '__len__' 

我一直在試圖找出什麼可能出錯了好幾個小時，但我不知道我做錯了。

這裏是我的代碼，我使用：

from Tkinter import * 
from requests import session 

class Login: 

    def __init__(self, master): 

     frame = Frame(master) 
     frame.pack() 

     self.emLabel = Label(frame, text="Email:") 
     self.emLabel.pack(side=LEFT) 

     self.email = Entry(frame, width=15) 
     self.email.pack(side=LEFT) 

     self.pasLabel = Label(frame, text="Password:") 
     self.pasLabel.pack(side=LEFT) 

     self.password = Entry(frame, show="*", width=15) 
     self.password.pack(side=LEFT) 

     self.hi_there = Button(frame, text="Login", command=self.login) 
     self.hi_there.pack() 

    def login(self): 

     self.payload = { 
      'action': 'login', 
      'email': self.email, 
      'password': self.password 
     } 

     with session() as c: 
      c.post('http://fruro.com/login.php', data=self.payload) 
      self.request = c.get('http://fruro.com') 
      print self.request.headers 
      print self.request.text 


root = Tk() 
login = Login(root) 
root.title("Login to your account") 
root.mainloop() 

任何幫助，將不勝感激。先謝謝你。

Answer 1

的問題是在這條線，

c.post('http://fruro.com/login.php', data=self.payload) 

而且它正在發生，因爲dict你逝去作爲data參數有那些和Entry部件引用不是那些小部件的含量值。因此，當Requests試圖獲得len時，您會收到錯誤，因爲Entry未執行__len__（不是您想要的）。修復它self.payload改爲類似，

self.payload = { 
     'action': 'login', 
     'email': self.email.get(),  # call get method to return 
     'password': self.password.get() # the value in the Entry widgets 
    }