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- from __future__ import absolute_import
-
- import inspect
- import warnings
-
-
- class RemovedInDjango20Warning(PendingDeprecationWarning):
- pass
-
-
- class RemovedInDjango110Warning(DeprecationWarning):
- pass
-
-
- RemovedInNextVersionWarning = RemovedInDjango110Warning
-
-
- class warn_about_renamed_method(object):
- def __init__(self, class_name, old_method_name, new_method_name, deprecation_warning):
- self.class_name = class_name
- self.old_method_name = old_method_name
- self.new_method_name = new_method_name
- self.deprecation_warning = deprecation_warning
-
- def __call__(self, f):
- def wrapped(*args, **kwargs):
- warnings.warn(
- "`%s.%s` is deprecated, use `%s` instead." %
- (self.class_name, self.old_method_name, self.new_method_name),
- self.deprecation_warning, 2)
- return f(*args, **kwargs)
- return wrapped
-
-
- class RenameMethodsBase(type):
- """
- Handles the deprecation paths when renaming a method.
-
- It does the following:
- 1) Define the new method if missing and complain about it.
- 2) Define the old method if missing.
- 3) Complain whenever an old method is called.
-
- See #15363 for more details.
- """
-
- renamed_methods = ()
-
- def __new__(cls, name, bases, attrs):
- new_class = super(RenameMethodsBase, cls).__new__(cls, name, bases, attrs)
-
- for base in inspect.getmro(new_class):
- class_name = base.__name__
- for renamed_method in cls.renamed_methods:
- old_method_name = renamed_method[0]
- old_method = base.__dict__.get(old_method_name)
- new_method_name = renamed_method[1]
- new_method = base.__dict__.get(new_method_name)
- deprecation_warning = renamed_method[2]
- wrapper = warn_about_renamed_method(class_name, *renamed_method)
-
- # Define the new method if missing and complain about it
- if not new_method and old_method:
- warnings.warn(
- "`%s.%s` method should be renamed `%s`." %
- (class_name, old_method_name, new_method_name),
- deprecation_warning, 2)
- setattr(base, new_method_name, old_method)
- setattr(base, old_method_name, wrapper(old_method))
-
- # Define the old method as a wrapped call to the new method.
- if not old_method and new_method:
- setattr(base, old_method_name, wrapper(new_method))
-
- return new_class
-
-
- class DeprecationInstanceCheck(type):
- def __instancecheck__(self, instance):
- warnings.warn(
- "`%s` is deprecated, use `%s` instead." % (self.__name__, self.alternative),
- self.deprecation_warning, 2
- )
- return super(DeprecationInstanceCheck, self).__instancecheck__(instance)
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