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Python Tkinter中的Entry.get()错误

[英]Entry.get() Error in Python Tkinter

我试图在插入ID或用户在输入框中输入食谱名称时删除记录。 但是由于以下错误,它不会让我从输入框中获取信息:

"Traceback (most recent call last):
   File "C:\Python33\lib\tkinter\__init__.py", line 1475, in __call__
   return self.func(*args)
  File "H:\A-Level Computing\PROJECT!\Final Code.py", line 368, in delete_recipe
  Retrieve1 = EntryBox1.get()
 AttributeError: 'NoneType' object has no attribute 'get'"

代码如下:

def delete_recipe():

    global EntryBox1, EntryBox2, new_db

    Retrieve1 = EntryBox1.get()
    Retrieve2 = EntryBox2.get()

    new_db = sqlite3.connect('H:\A-Level Computing\PROJECT!\Recipes.db')

    new_db.execute("DELETE from RecipesDetails WHERE Retrieve1 = Rec_ID and Retrieve2 = Name")

    new_db.commit()
    new_db.close()

我将非常感谢您的帮助; 谢谢!

确保您没有类似以下内容的行:

entry = Entry().pack() # entry is None

packgridplace不会返回None entry变为None

您应该分开Entry并调用pack / grid / place方法:

entry = Entry()
entry.pack()

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