How to clear text input field in tkinter?

Question

Python

I need to clear a text input field in tkinter. I found this solution on the Internet: entry.delete(0, END)Where entry is the name of the input field (direct link to it), 0 is the beginning of the input field string, END is the end of the input field string. This command should clear the input field from start to finish. But this error pops up:

AttributeError: 'NoneType' object has no attribute 'delete'

Who is familiar with tkinter, please help.

Answer 1

The method placedoes not return anything, so the line of code
assigns a entryvalue to a variable None
Correct to

entry = Entry(canvas, width=20,)
entry.place(x=150, y=300)

Answer 2

First you need to get the field itself. You didn't receive it.
within the class:

class Application(Tk):
  def OnEnterInput(self, event):
    text=u''+self.input.get()
    self.Send(text)
    self.input.delete(0, END)
  def createWidgets(self):
.....
    self.input = Entry(self, textvariable=self.inline)
    self.input.grid(row=0, column=0, columnspan=2, pady=3, padx=3, sticky='ew')
    self.input.bind("<Return>", self.OnEnterInput)

full code here