actuallyno this is the typical order of things in python programbut it' not the only possible layout classes can be defined anywhere they are typically defined at the module levelbut they can also be defined inside function or methodlike thisdef format_string(stringformatter=none)'''format string using the formatter objectwhich is expected to have format(method that accepts string ''class defaultformatter'''format string in title case ''def format(selfstring)return str(stringtitle(if not formatterformatter defaultformatter(return formatter format(stringhello_string "hello worldhow are you today?print(inputhello_stringprint("outputformat_string(hello_string)the output will be as followsinputhello worldhow are you todayoutputhello worldhow are you todaythe format_string function accepts string and optional formatter objectand then applies the formatter to that string if no formatter is suppliedit creates formatter of its own as local class and instantiates it since it is created inside the scope of the functionthis class cannot be accessed from anywhere outside of that function similarlyfunctions can be defined inside other functions as wellin generalany python statement can be executed at any time these inner classes and functions are occasionally useful for one-off items that don' require or deserve their own scope at the module levelor only make sense inside single method howeverit is not common to see python code that frequently uses this technique