如何在Python中使用相同的参数在X的子方法中实例化类X?

这个 copy 模块可能是您需要的:

密码

def method_a(self):
    return copy.copy(self)

更精细的控制:

在各种情况下,您可能只需要复制一些参数,可以使用 unpacking of argument lists 与…结合 getattr 要管理要复制的较长列表,请执行以下操作:

def method_a(self):
    attributes_to_copy = ('value1', 'value2')
    kwargs = {k: getattr(self, k) for k in attributes_to_copy}
    return type(self)(**kwargs)

测试代码:

import copy

class X(object):
    def __init__(self, value1, value2):
        self.value1 = value1
        self.value2 = value2

    def method_a(self):
        return copy.copy(self)

    def method_b(self):
        attributes_to_copy = ('value1', 'value2')
        kwargs = {k: getattr(self, k) for k in attributes_to_copy}
        return type(self)(**kwargs)

x1 = X(1, 2)
x2 = x1.method_a()
x3 = x1.method_b()
assert x1.value1 == x2.value1
assert x1.value1 == x3.value1