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Boxiang Sun
cython
Commits
776ca207
Commit
776ca207
authored
Jul 01, 2009
by
Robert Bradshaw
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__new__ clarification
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cad7d1de
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docs/sharing_declarations.rst
docs/sharing_declarations.rst
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docs/special_methods.rst
docs/special_methods.rst
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docs/sharing_declarations.rst
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776ca207
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@@ -212,7 +212,7 @@ and another module which uses it.::
# Shrubbing.pyx
cdef class Shrubbery:
def __
new
__(self, int w, int l):
def __
cinit
__(self, int w, int l):
self.width = w
self.length = l
...
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docs/special_methods.rst
View file @
776ca207
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@@ -65,12 +65,20 @@ subclassing your extension type in Python, you may find it useful to give the
:meth:`__cinit__` method `*` and `**` arguments so that it can accept and
ignore extra arguments. Otherwise, any Python subclass which has an
:meth:`__init__` with a different signature will have to override
:meth:`__new__` as well as :meth:`__init__`, which the writer of a Python
class wouldn't expect to have to do. As a convenience, if you declare
:meth:`__new__`
[#]
as well as :meth:`__init__`, which the writer of a Python
class wouldn't expect to have to do. A
lternatively, a
s a convenience, if you declare
your :meth:`__cinit__`` method to take no arguments (other than self) it
will simply ignore any extra arguments passed to the constructor without
complaining about the signature mismatch.
.. Note: Older Cython files may use :meth:`__new__` rather than :meth:`__cinit__`. The two are synonyms.
The name change from :meth:`__new__` to :meth:`__cinit__` was to avoid
confusion with Python :meth:`__new__` (which is an entirely different
concept) and eventually the use of :meth:`__new__` in Cython will be
disallowed to pave the way for supporting Python-style :meth:`__new__`
.. [#] http://docs.python.org/reference/datamodel.html#object.__new__
Finalization method: :meth:`__dealloc__`
----------------------------------------
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