manager.py

class Manager:

    def __init__(self, _class):
        self._claas = _class

    def __str__(self):
        return f'Manager : {self._claas}'

    def search(self, **kwargs):
        results = []
        for obj in self._claas.object_list:
            answers = []
            for key, value in kwargs.items():
                if key.endswith('__min'):
                    key = key[:-5]
                    compare_key = 'min'
                elif key.endswith('__max'):
                    key = key[:-5]
                    compare_key = 'max'
                else:
                    compare_key = 'equal'

                if hasattr(obj, key):
                    if compare_key == 'min':
                        result = bool(getattr(obj, key) >= value)
                        answers.append(result)
                    elif compare_key == 'max':
                        result = bool(getattr(obj, key) <= value)
                        answers.append(result)
                    else:
                        result = bool(getattr(obj, key) == value)
                        answers.append(result)
                else:
                    answers.append(False)

            if all(answers):
                results.append(obj)
        return results

    def get(self, **kwargs):
        for key, value in kwargs.items():
            for obj in self._claas.object_list:
                if hasattr(obj, key) and getattr(obj, key) == value:
                    return obj
        return None

    def count(self):
        return len(self._claas.object_list)