Initialize instance variables outside of Python class

Question

Edit

In comments inheritance was suggested however this is already being done and I've added additional code snippet to show.

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There are a few similar questions of initializing instance variables outside of __init__ where instance variables are initialized further down in the class within another def function (method). This question isn't a duplicate of those questions.

I have three classes all declaring the same self.xxxx instance variables after the def __init__:

class AskQuestion(simpledialog.Dialog):
    """ Prepends "\n" to text passed.
        Appends "\n\nAre you sure?\n" to text passed.
        Allows text to be highlighted and copied to clipboard with CTRL+C.
        Blocks other windows from getting focus
        MON_FONTSIZE is temporary font size until configuration file set up.
    """

    def __init__(self, parent, title=None, text=None, confirm='yes',
                 align='center', thread=None, icon='warning'):
        self.confirm = confirm      # Append "Are you sure?" line?
        self.align = align          # data (text lines) alignment
        self.thread = thread        # The thread run before button click
        self.loop_no = 1            # Loop counter (not used yet)
        self.data = text            # data (text lines) for text box
        self.text = None            # Textbox widget
        self.icon = icon            # Warning, Error, Info, Question icons
        try:
            self.font = (None, MON_FONTSIZE)
        except NameError:
            self.font = (None, 10)

        # Shared functions
        self.wait_window = wait_window_func
        #self.body = body(self, parent)
        #self.body = body

        simpledialog.Dialog.__init__(self, parent, title=title)

How can these lines of code be spun out into a global function which is called to initialize the variables? I'm searching for a technique similar to the bash . (source command) or the C #include command except variables won't be sourced from another file, simply a global function within the current file (module).

FYI I'm looking for consistency and code reduction for tkinter simpledialog class wrappers for ShowInfo, AskQuestion, AskString, etc.

Answer 1

in a a case where your classes share init methods you can reduce code by inherting them, like this

class A(B):

where B is a parent class, also according to the question you can inherit more than one classes,like this

class A(B,C):

I am providing a generic answer to avoid the same discussion as in comments