input: Write a function to edit the given Python code so that it prompts the user to enter the value of the radius to calculate the area of a circle. The function should return the modified code as a string.
  assert edit_code()=="""# Calculate area of a circle\n\nPi = 3.14\n\n# Get radius from user\nradius = float(input(\"Please enter the radius of the circle: \"))\n\n# Calculate the circle area\narea = Pi*radius**2\n\n# Print the area\nprint(\"The area of the circle is:\", area)"""
  assert edit_code().startswith("# Calculate area of a circle\n\nPi = 3.14\n\n")==True
  assert "float(input(\"Please enter the radius of the circle: \"))" in edit_code()
  assert edit_code().endswith("print(\"The area of the circle is:\", area)")==True
output: def edit_code():
      return """# Calculate area of a circle
  
  Pi = 3.14
  
  # Get radius from user
  radius = float(input("Please enter the radius of the circle: "))
  
  # Calculate the circle area
  area = Pi*radius**2
  
  # Print the area
  print("The area of the circle is:", area)"""