Reckoner wrote:
hi,
I have the following problem: I have two objects, say, A and B, which
are both legitimate stand-alone objects with lives of their own.
A contains B as a property, so I often do
A.B.foo()
the problem is that some functions inside of B actually need A
(remember I said they were both standalone objects), so I have to
often do:
A.B.foo_func(A)
Which is kind of awkward.
Is there some way that B.foo_func() could somehow know that it was
called as a property of A in this way?
Note that I'm looking for the calling object and NOT the calling
function.
Thanks in advance.
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B has to get into A somehow. Providing an installation method is no
inconvenience if one remembers later not to bypass it.
class A:
something_for_contained_to_show = 99
def install_contained (self, B):
B.container = self # Provides B with a reference to A
self.contained = B
class B:
def method_with_container_access (self):
print self.container # Show container object
print self.container.something_for_contained_to_show
>>> a = A (); b = B (); a.install_contained (b)
>>> b.method_with_container_access ()
<__main__.A instance at 0x019D5788>
99
Does this look like a good idea?
Frederic
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