Vedanta Barooah wrote:
> in a python nested class is it possible to change the value of the
> parent class's variable without actually creating an instance of the
> parent class
Python nested classs are like *static* Java nested classes. Non-static
Java classes are very different in that they have an implicit reference
to an instance of the enclosing class. This is why you can instantiate
non-static inner classes only in the context (= non-static method) of a
specific object. There is no direct equivalent to this in Python, so you
have to do the steps yourself.
- the constructor takes an additional argument, the 'outer' object,
which has to be kept in the object:
def __init__ (self, outer, ...):
self.outer = outer
- when creating the inner object, the outer object must be passed to the
constructor
obj = InnerClass (self)
- the outer object must be explicitely referenced:
self.outer.increase (20)
Daniel
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