MetaGPT

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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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@Time    : 2023/5/11 16:15
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@Author  : alexanderwu
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@File    : singleton.py
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"""
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import abc
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class Singleton(abc.ABCMeta, type):
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    """
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    Singleton metaclass for ensuring only one instance of a class.
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    """
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    _instances = {}
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    def __call__(cls, *args, **kwargs):
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        """Call method for the singleton metaclass."""
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        if cls not in cls._instances:
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            cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs)
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        return cls._instances[cls]
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