libtcod | Ruby bindings for the libtcod roguelike library

In Python 3, dividing two ints always produces a float, so 80/2 and 50/2 are producing floats, not ints. To make them ints, you could either use floor division (80//2) or cast to int (int(80/2)).

I guess your tutorial is for Python 2, cause in Python 2, dividing two ints always produces an int.

More details

• What is the difference between '/' and '//' when used for division?
• PEP 238 -- Changing the Division Operator

The assertion is to make sure that objects, results, return, etc are what we expect them to be. Though they can be used for variable's type checking, that's not what their real purpose is and it gets repetitive.

In your case, I would suggest to use python EAFP way of doing things. Let the operation be performed on function input and catch the exception if it's not what is expected. From Python glossary :

EAFP: Easier to ask for forgiveness than permission. This common Python coding style assumes the existence of valid keys or attributes and catches exceptions if the assumption proves false. This clean and fast style is characterized by the presence of many try and except statements. The technique contrasts with the LBYL(Look before you leap) style common to many other languages such as C.

A quick example:

Take a look at this github project called tcod: https://github.com/libtcod/python-tcod/blob/master/README.rst#installation

It's a python port of libtcod.

To install using pip, use the following command:

python -m pip install tcod

If you get the error "ImportError: DLL load failed: The specified module could not be found." when trying to import tcod/tdl then you may need the latest Microsoft Visual C runtime. Blockquote

The second printable: 'k' is unreachable, since the first will match instead. What you want is doing both assignments in the same arm of the match, like this:

The option to use a different Makefile is -f, not -t.

-t means only "touch" everything to mark it as updated. You'll always never want this option.

Because -t doesn't have an argument, your ..\makefiles\makefile-mingw-sdl2 is interpreted as a target to be built, and as this exists and make doesn't know any prerequisites for it, there's nothing to do to build it, and make is telling you this with the message

Nothing to be done for ...\makefile.mingw-sdl2.

For the second message: Either there is no Makefile in your current directory or it doesn't contain a rule for all.

What you want is mingw32-make.exe -f ..\makefiles\makefile-mingw-sdl2

Next time you run into a problem, I suggest to at least read the output of mingw32-make --help. For anything else, GNU make also has a good online manual.

You can not access the cities by calling print system.planets.cities. As system.planets is a list of planets you need to access the cities for each planet separately.