When we define a function only gives it a name, specifies the parameters that are to be included in the function and structures the blocks of code and refer to that value .in calling function you have ...

Because the function has three parameters, every time the function is called, it must be supplied with three arguments. This is the default behavior for Python functions; the number of parameters and ...

My workaround uses static methods and class variables, but i think it can be made much more elegant. One easy solution wolud be to change the callback function signature, for example adding **kwargs ...

Python dataclasses can make your Python classes less verbose and more powerful at the same time. ... Provides the name of a function, which takes no parameters, ... and pass init as False to field.