Markus Zolliker
a7b741eaa4
- asynconn: raise * from * - asynconn: correct handling for timeout in AsynSerial - add new py35compat - target unit $ Change-Id: I052185ad3ebb3e3d1e3374f7ece9c7df06223951
59 lines
2.2 KiB
Python
59 lines
2.2 KiB
Python
# -*- coding: utf-8 -*-
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# *****************************************************************************
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Module authors:
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# Markus Zolliker <markus.zolliker@psi.ch>
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#
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# *****************************************************************************
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"""workaround for python versions older than 3.6
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``Object`` must be inherited for classes needing support for
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__init_subclass__ and __set_name__
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"""
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if hasattr(object, '__init_subclass__'):
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class Object:
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pass
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else:
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class PEP487Metaclass(type):
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# support for __set_name__ and __init_subclass__ for older python versions
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# slightly modified from PEP487 doc
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def __new__(cls, *args, **kwargs):
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if len(args) != 3:
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return super().__new__(cls, *args)
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name, bases, ns = args
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init = ns.get('__init_subclass__')
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if callable(init):
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ns['__init_subclass__'] = classmethod(init)
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newtype = super().__new__(cls, name, bases, ns)
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for k, v in newtype.__dict__.items():
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func = getattr(v, '__set_name__', None)
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if func is not None:
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func(newtype, k)
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if bases:
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super(newtype, newtype).__init_subclass__(**kwargs) # pylint: disable=bad-super-call
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return newtype
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def __init__(cls, name, bases, ns, **kwargs):
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super().__init__(name, bases, ns)
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class Object(metaclass=PEP487Metaclass):
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@classmethod
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def __init_subclass__(cls, *args, **kwargs):
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pass
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