37 lines
874 B
Python
37 lines
874 B
Python
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#!/usr/bin/env python
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# -*- encoding: utf-8 -*-
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"""
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Topic: 元类中的可选参数
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Desc :
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"""
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from abc import ABCMeta, abstractmethod
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class IStream(metaclass=ABCMeta):
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@abstractmethod
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def read(self, maxsize=None):
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pass
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@abstractmethod
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def write(self, data):
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pass
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class MyMeta(type):
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# Optional
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@classmethod
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def __prepare__(cls, name, bases, *, debug=False, synchronize=False):
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# Custom processing
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pass
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return super().__prepare__(name, bases)
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# Required
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def __new__(cls, name, bases, ns, *, debug=False, synchronize=False):
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# Custom processing
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pass
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return super().__new__(cls, name, bases, ns)
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# Required
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def __init__(self, name, bases, ns, *, debug=False, synchronize=False):
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# Custom processing
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pass
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super().__init__(name, bases, ns)
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