Color input

Question

If I enter a color in advance in the program, it can become a number. If I enter a color while the program is running there will be an error. https://code.sololearn.com/cmjJFuk0vg2K/?ref=app

Answer 1

You need to provide a base 16 to the int function in order to convert the hex string "0xffffff" to an int.
So in you first lines, it should be like:
col = int(input(), 16)

Answer 2

In the first case the hex number is in string form (because input() returns string). So to convert that to integer, you need to pass in an extra argument to tell Python that this is a hex number in the form of a string, that you want to convert to int. That extra argument is the number 16, as the base of hex numbers is 16
col = int(input(), 16) #works fine

In the second case, you are directly converting a hex number to int, so there is no problem.