如何将变量放入Python docstring中

"""
This is my_variable's documentation.

my_variable
    This variable is a simple variable that we want to document.
"""

my_variable = "Hello, world!"

class MyClass:
    """
    This is my_class's documentation.

    my_class
        This class is a simple class that we want to document.

    Methods:
        my_method
            This method is a simple method that we want to document.
    """

    def my_method(self):
        """
        This is my_method's documentation.

        Parameters:
            arg1 (int): This is an argument that we want to document.
            arg2 (str): This is another argument that we want to document.

        Returns:
            bool: This is a return value that we want to document.
        """
        return True