Question

我正在尝试创建一个收集实验数据的程序。我已经成功创建了一个包含标签和条目小部件的表。但是，当尝试通过收集输入的数据使入口小部件起作用时，我的脚本将失败。

import tkinter as tk
from PIL import ImageTk, Image


class Window(tk.Frame):

def __init__(self, master=None):
   tk.Frame.__init__(self, master)               
   self.master = master
   self.init_window()
def init_window(self):
   self.master.title("Data Analyser")

   tk.Label(self.master, text="Cell Number").grid(row=1, sticky=tk.W)
   tk.Label(self.master, text="1").grid(row=2) 
   tk.Label(self.master, text="1").grid(row=2)      


   tk.Label(self.master, text="Treatment").grid(row=1, column=2)
   Treatment_1 = tk.Entry(self.master).grid(row=2,column=2)
   Treatment_2 = tk.Entry(self.master).grid(row=3,column=2)

   tk.Button(self.master, text = "Submit", command = self.getInput).grid(row = 14, column = 2)

def getInput(self):    
   global Treatment_Data
   a = Treatment_1.get()
   b = Treatment_2.get()
   Treatment_Data = [a,b]



root = tk.Tk()
root.geometry("500x450")
app = Window(root) 
root.mainloop()

我希望上面的代码将生成一个名为“ Treatment_Data”的全局变量，但是不幸的是，当我单击“提交”小部件时，收到以下错误消息：

 Traceback (most recent call last):
    File "C:\Users\xxxx\lib\tkinter\__init__.py", line 1550, in __call__
    return self.func(*args)
    File "<ipython-input-134-2b5d212a0dcf>", line 47, in getInput
       a = self.Treatment_1.get()
  AttributeError: 'NoneType' object has no attribute 'get'

任何澄清将不胜感激。

Answer 1

仅需要使用self来将Treatment_1和Treatment_2设置为类变量，然后才能在回调函数getInput（）中访问它们。
注释中提到的另一件事是，您需要将这两个部分分开-
1.创建一个Entry Widget，然后
2.将其放置在网格中。
您应该创建一个Entry小部件并将其存储在Treatment_1中。完成后，您应该使用Treatment_1变量将小部件放置在网格中的所需位置。

import tkinter as tk
from PIL import ImageTk, Image

class Window(tk.Frame):
   def __init__(self, master=None):
      tk.Frame.__init__(self, master)               
      self.master = master
      self.init_window()
   def init_window(self):
      self.master.title("Data Analyser")
      tk.Label(self.master, text="Cell Number").grid(row=1, sticky=tk.W)
      tk.Label(self.master, text="1").grid(row=2) 
      tk.Label(self.master, text="1").grid(row=2)      
      tk.Label(self.master, text="Treatment").grid(row=1, column=2)
      self.Treatment_1 = tk.Entry(self.master)
      self.Treatment_2 = tk.Entry(self.master)
      self.Treatment_1.grid(row=2,column=2)
      self.Treatment_2.grid(row=3,column=2)
      tk.Button(self.master, text = "Submit", command = self.getInput).grid(row = 14, column = 2)
   def getInput(self):    
      global Treatment_Data
      a = self.Treatment_1.get()
      b = self.Treatment_2.get()
      Treatment_Data = [a,b]
      print(Treatment_Data)

root = tk.Tk()
root.geometry("500x450")
app = Window(root) 
root.mainloop()

tkinter入口小部件中输入的数据包含“ NoneType”对象，并且没有属性“ get”

1 个答案: