python - 简单的 pythoncurses-application 在运行时使用 100% CPU。这是正常的吗？

Question

我正在构建这个简单的应用程序，我注意到当curses运行时，“top”中的CPU负载是100%..这看起来很糟糕。谁能解释一下吗？

def Run(self, stdscr):

    self.screen = stdscr

    curs_set(0)
    self.screen.nodelay(1)
    self.y_max = self.screen.getmaxyx()[0]
    self.x_max = self.screen.getmaxyx()[1] 

    for e in self.Inv:
        self.Create_Win(self.Inv.index(e), e)

    self.test_win = self.screen.derwin(1, self.x_max, 10, 0)
    self.test_win.addstr(self.TargetDict["Target_1"]["Obj"].Name)

    running = True
    while running:
        self.screen.refresh()
        q = self.screen.getch()


        #Press q to exit program
        if q == ord("q"):
            running = False

这是程序运行时的样子。一旦我用“q”终止程序，它就会恢复正常。

Answer 1

问题是对getch的调用不是阻塞的，因此程序不断地循环通过while循环。来自 getch documentation :

Get a character. Note that the integer returned does not have to be in ASCII range: function keys, keypad keys and so on return numbers higher than 256. In no-delay mode, -1 is returned if there is no input, else getch() waits until a key is pressed.

您的程序在循环之前设置nodelay:

self.screen.nodelay(1)