On 02/16/2011 06:05 AM, Richard Thomas wrote:
On Feb 16, 2:23 am, s...@uce.gov wrote:
How can I do something like this in python:
#!/usr/bin/python3.1
class MyNumbers:
def __init__(self, n):
self.original_value = n
if n<= 100:
self = SmallNumers(self)
else:
self = BigNumbers(self)
class SmallNumbers:
def __init__(self, n):
self.size = 'small'
class BigNumbers:
def __init__(self, n):
self.size = 'big'
t = MyNumbers(200)
When I do type(t) it says MyNumbers, while I'd want it to be BigNumbers,
because BigNumbers and SmallNumbers will have different methods etc...
Do I need to use metaclasses?
Thanks.
--
Yves. http://www.SollerS.ca/
http://blog.zioup.org/
If you don't want to use a factory function I believe you can do this:
class MyNumber(object):
def __new__(cls, n):
if n<= 100:
cls = SmallNumbers
else:
cls = BigNumbers
return object.__new__(cls, n)
...
Chard.
Very beautiful code great alternative to factory method!
To memorize this pythonic way.
Regards
Karim
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