What's the equivalent of Ruby's class @@variable in Python?
In Ruby 1.9, I can use its class variable like the f开发者_StackOverflow中文版ollowing:
class Sample
@@count = 0
def initialize
@@count += 1
end
def count
@@count
end
end
sample = Sample.new
puts sample.count # Output: 1
sample2 = Sample.new
puts sample2.count # Output: 2
How can I achieve the above in Python 2.5+ ?
class Sample(object):
_count = 0
def __init__(self):
Sample._count += 1
@property
def count(self):
return Sample._count
The use is a bit different from Ruby; e.g. if you have this code in module a.py
,
>>> import a
>>> x = a.Sample()
>>> print x.count
1
>>> y = a.Sample()
>>> print x.count
2
having a Sample.count "class property" (with the same name as the instance property) would be a bit tricky in Python (feasible, but not worth the bother IMHO).
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