Class confusion

Matt Jones matt.walker.jones at gmail.com
Thu Jan 10 04:19:27 CET 2013


Does this look sufficient for what?  You haven't actually told us what it
is you're trying to accomplish.  I gave you the "how", you must supply the
"why".

*Matt Jones*


On Wed, Jan 9, 2013 at 6:43 PM, Rodrick Brown <rodrick.brown at gmail.com>wrote:

> Can anyone care to advise on the following? Based on the responses does
> this look sufficient?
>
> #!/opt/local/bin/python
>
> class SystemList(object):
>     sysmap = { '1039' : 'nebula',
>                '1040' : 'mercury'}
>
>     def __init__(self, sysid):
>         self.sysid = sysid
>
>     def get_sysname(self):
>         return self.sysmap[self.sysid]
>
> class System(object):
>     def __init__(self):
>         pass
>
>     def get_hostname(self,sysid):
>         return  SystemList(sysid)
>
> if __name__ == '__main__':
>     sc = System()
>
>     for sysid in ('1039','1040'):
>         print(sc.get_hostname(sysid).get_sysname())
>
>
>
> On Wed, Jan 9, 2013 at 5:18 PM, Rodrick Brown <rodrick.brown at gmail.com>wrote:
>
>> On Wed, Jan 9, 2013 at 4:34 PM, Matt Jones <matt.walker.jones at gmail.com>wrote:
>>
>>> # Something like...
>>>
>>> class SystemList(object):
>>>    def get_systemid(self):
>>>       return "System Id: bleh"
>>>
>>>    def get_running_kernel(self):
>>>       return "Kernel: bleh"
>>>
>>>
>>> class SatelliteConnect(object):
>>>    def get_systemlist(self):
>>>       return SystemList()
>>>
>>>
>>> # Now the code you wrote would work, only return those literals thought,
>>> you'd want to do something meaningful inside of SystemList's methods.
>>>
>>>
>> Thanks for the tip Matt, I had no idea it was so simple. :-)
>>
>>
>>>  *Matt Jones*
>>>
>>>
>>> On Wed, Jan 9, 2013 at 3:28 PM, MRAB <python at mrabarnett.plus.com> wrote:
>>>
>>>> On 2013-01-09 20:13, Rodrick Brown wrote:
>>>>
>>>>> How can I make a class that has methods with attributes and other
>>>>> functions?
>>>>> I see a lot of code
>>>>>
>>>>>
>>>>> I'm reading the documentation to Redhat's Satellite software which has
>>>>> a
>>>>> XMLRPC interface and wrote the following code to test the api.
>>>>>
>>>>> I would like to extend this code to support methods with methods? I see
>>>>> this done a lot in python code but I'm not sure how to accomplish
>>>>> something like this?
>>>>>
>>>>> i.e.
>>>>>
>>>>> sc = SatelliteConnect()
>>>>> sc.get_systemlist().get_**systemid() ?
>>>>> or
>>>>> sc.get_systemlist().get_**running_kernel()
>>>>>
>>>>> How does one chain methods and attributes like this with classes?
>>>>>
>>>>>  [snip]
>>>> This:
>>>>
>>>>     sc.get_systemlist().get_**systemid()
>>>>
>>>> simply means that the method "get_systemlist" returns an instance of
>>>> some class (let's call it "SystemList") which has a method
>>>> "get_systemid".
>>>>
>>>> --
>>>> http://mail.python.org/**mailman/listinfo/python-list<http://mail.python.org/mailman/listinfo/python-list>
>>>>
>>>
>>>
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>>
>>>
>>
>
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