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[英]Python - TypeError: object of type 'NoneType' has no len()
[英]Python tkinter TypeError: object of type 'NoneType' has no len()
我已經編寫了程序,可以按比例確定想要多少個單詞。 當我在秤中取1,然后嘗試在標簽中打印時,出現錯誤:
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python33\lib\tkinter\__init__.py", line 1475, in __call__
return self.func(*args)
File "C:\Users\Eduard\Desktop\Zeugs\python\test.py", line 69, in ok3
label['text']=random.choice(WORDS)
File "C:\Python33\lib\random.py", line 249, in choice
i = self._randbelow(len(seq))
TypeError: object of type 'NoneType' has no len()
這是代碼:
import tkinter as tk
from tkinter import *
import random
from functools import partial
class SampleApp(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
container= tk.Frame(self)
container.pack(side="top", fill="both", expand=True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.frames={}
for F in (mode2, scale1):
frame= F(container, self)
self.frames[F]=frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(mode2)
def show_frame(self, c):
frame=self.frames[c]
frame.tkraise()
class mode2(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
def antmenge(self):
label1["text"]="Mögliche Antworten: " \
+ str(antmengen.get()) + " "
label1=tk.Label(self, text="Mögliche Antworten: 0 Wörter", width=25)
label1.pack()
antmengen=IntVar()
antmengen.set(0)
antm=Scale(self, width=20, length=200, orient="vertical", from_=0, to=20,
resolution=1, tickinterval=10, label="Wörter", command=antmenge(self),
variable=antmengen)
antm.pack()
def abfrage():
if antmengen.get()==1:
button3=Button(self, text="push again", command=lambda: controller.show_frame(scale1))
button3.pack()
button2=tk.Button(self, text="push", command=abfrage)
button2.pack()
class scale1(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label1=Label(self, text="Wort1")
label1.pack()
wort1auf=Entry(self)
wort1auf.pack()
label=tk.Label(self, text=" ")
label.pack()
a=label.configure(text=(wort1auf.get()))
def ok3(label):
WORDS=(a)
label['text']=random.choice(WORDS)
button1=tk.Button(self, text="push", command=partial(ok3, label))
button1.pack()
if __name__== "__main__":
app=SampleApp()
app.mainloop()
抱歉,我的英語不好。
好的
因此開始。
a=label.configure(text=(wort1auf.get()))
def ok3(label):
WORDS=(a)
label['text']=random.choice(WORDS)
出現錯誤的原因是,因為label.configure(...)返回None,所以a和因此WORDS都為NONE。
我認為WORDS應該是可供選擇的單詞列表。 我不確定您要用輸入的單詞填充“ a”嗎? 如果是這種情況,WORDS =(a)可以使用,但是您必須在“ ok3”內部移動“ a”
def ok3(label):
a=label.configure(text=(wort1auf.get()))
WORDS=(a)
label['text']=random.choice(WORDS)
第二。 它應該檢索輸入的值。
def ok3(label):
WORDS=(wort1auf.get()) # this will choose a random letter out of your input.
#WORDS=(wort1auf.get(),) # this will choose a the input word, since it is the only word inside the tuple.
WORDS=(a)
label['text']=random.choice(WORDS)
希望這對LG Daniel有幫助
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