Bases: type
Metaclass to provide a deprecation path for renamed classes
This metaclass provides a mechanism for renaming old classes while
still preserving isinstance / issubclass relationships.
Examples
>>> from pyomo.common.deprecation import RenamedClass
>>> class NewClass(object):
... pass
>>> class OldClass(metaclass=RenamedClass):
... __renamed__new_class__ = NewClass
... __renamed__version__ = '6.0'
Deriving from the old class generates a warning:
>>> class DerivedOldClass(OldClass):
... pass
WARNING: DEPRECATED: Declaring class 'DerivedOldClass' derived from
'OldClass'. The class 'OldClass' has been renamed to 'NewClass'.
(deprecated in 6.0) ...
As does instantiating the old class:
>>> old = OldClass()
WARNING: DEPRECATED: Instantiating class 'OldClass'. The class
'OldClass' has been renamed to 'NewClass'. (deprecated in 6.0) ...
Finally, isinstance and issubclass still work, for example:
>>> isinstance(old, NewClass)
True
>>> class NewSubclass(NewClass):
... pass
>>> new = NewSubclass()
>>> isinstance(new, OldClass)
WARNING: DEPRECATED: Checking type relative to 'OldClass'. The class
'OldClass' has been renamed to 'NewClass'. (deprecated in 6.0) ...
True
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__init__(*args, **kwargs)
Methods
__init__(*args, **kwargs)
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mro()
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Return a type's method resolution order. |
Member Documentation
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mro()
Return a type’s method resolution order.