Inspirovan, jeste malicko rozvinu. :-)
>>> a = 257
>>> b = 257
>>> a is b
False
>>> c = d = 257
>>> c is d # logicky True
True
>>> e, f = 257, 257 # tohle je vsak zajimave
>>> e is f
True
>>> g = 'nazdar'
>>> h = 'nazdar'
>>> g is h
True
>>> i = 'nazdar'*1000
>>> j = 'nazdar'*1000
>>> i is j
False
>>> i == j
True
>>> k = intern(i)
>>> l = intern(j)
>>> k is l
True
On 11.5.2015 12:46, Pavel Schön wrote:
> $ python
> Python 2.6.6 (r266:84292, Nov 21 2013, 10:50:32)
> [GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2
>>>> a = 256
>>>> b = 256
>>>> a is b
> True
>>>> a = 257
>>>> b = 257
>>>> a is b
> False
>
>
> On Sunday, May 10, 2015 at 1:05:58 AM UTC+2, Vladimir Macek wrote:
>> Just having fun.
>>
>> $ python
>> >>> a = {}
>> >>> b = {'a': a}
>> >>> a['b'] = b
>> >>> a
>> {'b': {'a': {...}}}
>> >>> b
>> {'a': {'b': {...}}}
>> >>> import cPickle
>> >>> ap = cPickle.dumps(a)
>> >>> del a, b
>> >>> len(ap)
>> 26
>> >>> a = cPickle.loads(ap)
>> >>> a
>> {'b': {'a': {...}}}
>> >>> a['b']
>> {'a': {'b': {...}}}
>> >>> a['b']['a']
>> {'b': {'a': {...}}}
>> >>> a['b']['a']['b']
>> {'a': {'b': {...}}}
>> >>>
>>
>> Navaze nekdo? :-)
>>
>> V.
>>
>>
>> --- news://freenews.netfront.net/ - complaints: n...@netfront.net ---
>
--
: Vladimir Macek : http://macek.sandbox.cz : +420 608 978 164
: UNIX && Dev || Training : Python, Django : PGP key 97330EBD
: http://macek.sandbox.cz/skoleni/
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