Pyqt mining mine Game Study Notes (6)

To learn other people's works, you have a great advantage and can look at your own shortcomings.

Your own shortcomings are often due to lack of basic knowledge and poor basic skills.

Today, I want to add another lesson: asterisk expression (* expression ).

In the mine mining program, two asterisks are used. One is in Main. py, and the other is in game_scene.py.

First, let's look at the first situation:

@pyqtSlot()def on_action_Setup_triggered(self):    result = setup.getSetup()    if not result: return    self.scene.setMap(*result)    self.scene.start()

The result here is returned from setup. py, which is like this:

def getSetup():    if SetupDlg().exec_() != QDialog.Accepted: return    return (conf.w, conf.h), conf.mines

That is, result = (Conf. W, Conf. h), Conf. Mines)

Then, parse the result with an asterisk. After calling the self. Scene. setmap (* result) function,

In game_scene.py:

def setMap(self, size, mines):        self.setup = size, mines        self.map_size = size        self.mines = mines

It can be seen that * The result is parsed into two objects, one being the size of the tuples and the other being the integer mine.

If * result Parsing is not required, the header parameter of the setmap function is an object of result, which must be parsed again.

The following function new_func uses the asterisk expression in the second part, which is also common:

def inGame(func):    """    check if this game is running    """    def new_func(self, *args, **kw):        if self.status != RUNNING: return        return func(self, *args, **kw)    return new_func

Note! First, the asterisk expression can only be used in the function header. Otherwise, it is a syntax error;

Second, the asterisk is important, not the parameter name;

Third, asterisks mean that the parameter belongs to the iterable type, and its length can be measured using the Len () function.

The following is a simple example:

>>> def func(*S,**K):print(S,'\n',K)...>>> func(1,[2,3],a=5,b='6',c='asd')(1, [2, 3]) {'a': 5, 'c': 'asd', 'b': '6'}>>>

Pyqt mining mine Game Study Notes (6)