input: Write a python function to create a Tkinter window with a label saying "Hello, World!" and set the window size to 300x200.
  assert create_window_with_label().winfo_width() == 300
  assert create_window_with_label().winfo_height() == 200
output: def create_window_with_label():
      import tkinter as tk
  
      root = tk.Tk()
      root.geometry("300x200")
  
      label = tk.Label(root, text="Hello, World!")
      label.pack()
  
      return root