如何在类范围外访问变量定义的浏览按钮类

class BrowseButton:
    def __init__(self):
        self.variable = "some value"
    
    def get_variable(self):
        return self.variable

button = BrowseButton()
variable_value = button.get_variable()

class BrowseButton:
    variable = "some value"

variable_value = BrowseButton.variable

class BrowseButton:
    variable = "some value"
    
    @staticmethod
    def get_variable():
        return BrowseButton.variable

variable_value = BrowseButton.get_variable()