self.func is a operation that bind self to the function.
class A(object):
def __init__(self):
self.b = B()
self.b.run(self.func)
def func(self):
print "callback"
class B(object):
def run(self, cb):
self.cb = cb
self.cb()
import sys
foo = A()
print sys.getrefcount(foo) # output: 3
Here are 3 objects ref to foo:
-
fooas a local variable, - a ref in getrefcount
- a ref in
foo.b.cb
It's more like self.func is func.self = self, bind self to the function.
