make() needs better error handling

[soumitradev]

I don't know if you want to handle all errors, but make() needs better error handling when the input is invalid.

the row = input().split(maxsplit=self.C) and the code after the line gives a string to float conversion error when the user inputs more numbers than the size.

Maybe we can check if the line has the correct number of numbers and then ask the user to enter a valid row if the input is invalid?

[mdvsh]

Yes. This needs to be done. As I mentioned in the README, input error handling is still to be done. I'll do it.