YJL: one-liner

Sometimes, I like tweeting in code instead of plain words. So I tweeted this:

exec('class Me:\n def drink_beer(self): self.has_headache = True') ; me = Me() ; me.drink_beer() ; print me.has_headache #BEER

exec is a statement not a function¹.

I had tried to use eval() first but it only accepts expression so exec seems to be right one to use because it accepts statement, well you can feed it with a entire source file actually. If we just give our code, then the code will be executed in current scope.

I do this is because I need to have one-liner code, you dont have \n or <br/> on Twitter³, I just wrote it for fun. If you want to use eval() or exec in real program, you must use them with care.

[1]	This would work because a tuple with only one element is not a tuple but the element unless you append with `,` after that only element². So it is evaluated like `exec only_element`.

[2]	A single item tuple must have a trailing comma, such as `(d,)`, from documentation.

[3]	Actually it has `\n` but you have to go to HTML source code, atom feed, or json via API. In the representation of HTML, `\n` doesnt give your line break.