input: Write a function to edit the provided Python code such 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_circle_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)"
output: def edit_circle_code():
      return "# 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)"