[issue26306] Can't create abstract tuple

[R. David Murray]

Changes by R. David Murray :


--
resolution:  -> duplicate
stage: test needed -> resolved
status: open -> closed
superseder:  -> abstract class instantiable when subclassing dict

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[issue26306] Can't create abstract tuple

[Luiz Poleto]

Luiz Poleto added the comment:

Same as reported on issue #5996. Apparently this happens not only with tuple 
but with any builtin type.

There is a patch on that issue but there hasn't been any activity since 2011.

--
nosy: +luiz.poleto

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[issue26306] Can't create abstract tuple

[Terry J. Reedy]

Terry J. Reedy added the comment:

3.2 to 3.4 only get security fixes

--
components: +Library (Lib)
nosy: +terry.reedy
stage:  -> test needed
versions: +Python 3.6 -Python 3.2, Python 3.3, Python 3.4

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[issue26306] Can't create abstract tuple

[Terry J. Reedy]

Changes by Terry J. Reedy :


--
nosy:  -terry.reedy

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[issue26306] Can't create abstract tuple

[Maciej Szulik]

Changes by Maciej Szulik :


--
nosy: +maciej.szulik

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[issue26306] Can't create abstract tuple

[Jack Hargreaves]

New submission from Jack Hargreaves:

When creating an abstract class, subclassing tuple causes check for 
instantiation of an abstract class to be bypassed. See the associated 
stackoverflow question -- 
http://stackoverflow.com/questions/35267954/mix-in-of-abstract-class-and-namedtuple

from abc import abstractmethod, ABCMeta

class AbstactClass(tuple, metaclass=ABCMeta):

@abstractmethod
def some_method(self):
pass

# following should throw a TypeError, but doesn't
AbstactClass()

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messages: 259839
nosy: Jack Hargreaves
priority: normal
severity: normal
status: open
title: Can't create abstract tuple
type: behavior
versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4, Python 3.5

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