title: How to insert a temporary text in a tkinter Entry widget?
body: <p>How to insert a temporary text in a tkinter <code>Entry</code> widget?</p>
  
  <p>For example, I have a Label <code>User</code> and next to it I have an Entry widget which should have some text <code>"Enter your username..."</code> at the beginning of the application, and while putting cursor on the Entry widget, it should remove <code>"Enter your username..."</code> and allow user to enter data. </p>
  
  <p>This is my current code:</p>
  
  <pre><code>import tkinter as tk
  
  root = tk.Tk()
  
  label = tk.Label(root, text="User:")
  label.pack()
  entry = tk.Entry(root, bd=1, show="Enter your user name...")
  entry.pack()
  
  root.mainloop()
  </code></pre>
  
  <p>How can I do that? </p>
  
  <p>I didn't find any option or method to delete data on putting cursor on the Entry widget. </p>