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# Copyright (C) 2014-2021 Greenbone Networks GmbH |
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# |
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# SPDX-License-Identifier: AGPL-3.0-or-later |
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# |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU Affero General Public License as |
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# published by the Free Software Foundation, either version 3 of the |
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# License, or (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU Affero General Public License for more details. |
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# |
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# You should have received a copy of the GNU Affero General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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# pylint: disable=bad-mcs-classmethod-argument, no-member |
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_has_init_subclass = hasattr( # pylint: disable=invalid-name |
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type, "__init_subclass__" |
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) |
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if not _has_init_subclass: |
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class InitSubclassMeta(type): |
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"""Metaclass that implements PEP 487 protocol""" |
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def __new__(cls, name, bases, ns, **kwargs): |
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__init_subclass__ = ns.pop("__init_subclass__", None) |
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if __init_subclass__: |
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__init_subclass__ = classmethod(__init_subclass__) |
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ns["__init_subclass__"] = __init_subclass__ |
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return super().__new__(cls, name, bases, ns, **kwargs) |
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def __init__(cls, name, bases, ns, **kwargs): |
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super().__init__(name, bases, ns) |
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super_class = super(cls, cls) |
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if hasattr(super_class, "__init_subclass__"): |
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super_class.__init_subclass__.__func__(cls, **kwargs) |
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else: |
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InitSubclassMeta = type # type: ignore |
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