java - 如何在 Python 中对 Java 进行类似的公共(public)静态声明？

Question

在我的Java中，我有一个中央引导加载程序，它将所有默认值保留为公共(public)静态或私有(private)静态，稍后当需要时我可以转到其他类/线程并访问它们以进行修改等。例如:

public class main extends JWindow implements MouseListener, MouseMotionListener {

  private static boolean isDetect = true;
  public  static String  vncMode  = "1980";
  ...

  public main() { 
    vncMode = C.readIni("vncmode"); // 1980
  }    
}

public class TCPHandler implements Runnable {
  import main.*;
  public void run() {
    if (main.vncMode.equals("1999" ) || 
        main.vncMode.equals("2013")) {
      echo(main.vncMode, RED);
    } else {
      echo(main.vncMode, GREEN);
    }
  }
}

与Java类似，在Python中，我如何设置公共(public)静态/私有(private)静态声明，以便我可以从该值的任何其他类访问？

python1.py:

from bgcolors import bgcolors
class Python1(object):
  isDetect = True  
  def run(self):
    # expecting vncMode = 1980
    print bgcolors.RED +  "we are now in 1999: from version: " + vncMode

python2.py:

from bgcolors import bgcolors
class Python2(object):
  isDetect = True  
  def run(self):
    # expecting vncMode = 1980
    print bgcolors.RED + "we are now in 2013: from version: " + vncMode

main.py:

from bgcolors import bgcolors
from python1 import Python1
from python2 import Python2

vncMode = "1980"

a = Python1()
a.run()

b = Python2()
b.run()

我如何设置值 1980 并在所有类中获取 1980 ？

Answer 1

如果您有一个容器来存储您想要共享的属性

# example, could be a simple tuple, a full class or instance or dictionary, etc.
attributes = namedtuple("attributes", "vncmode")("1980")

您可以在初始化时将属性传递给所有类:

class ...:
    def __init__(self, attributes, ...):
        self.attributes = attributes

然后实例可以使用self.attributes.vncmode作为共享可变值。