Am 18.04.2017 um 13:17 schrieb Peter Otten:
Thomas Güttler wrote:
I would like to have read-only class properties in Python.
I found this
http://stackoverflow.com/questions/128573/using-property-on-classmethods
But there are a lot of discussions of things which I don't understand.
I want to be a user of class properties, not an implementer of the
details.
I found this: https://pypi.python.org/pypi/classproperty
But above release is more then ten years old. I am unsure if it's dead or
mature.
I am using Python 2.7 and attribute getters would be enough, no attribute
setter is needed.
My use case is configuration, not fancy algorithms or loops.
Like this?
$ cat classproperty.py
class classproperty(object):
def __init__(self, fget):
self.fget = fget
def __get__(self, inst, cls):
return self.fget(cls)
class Foo(object):
FOO = 42
@classproperty
def foo(cls):
return cls.FOO
print "Foo.foo =", Foo.foo
print "Foo().foo =", Foo().foo
$ python2 classproperty.py
Foo.foo = 42
Foo().foo = 42
Nice, if it is that simple.
Is there a reason why this is not in the standard library?
Regards,
Thomas Güttler
--
Thomas Guettler http://www.thomas-guettler.de/
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