Is there some way to call a function each-time the value of a variable changes, in python?
Something like a listener, perhaps?
Specifically, I'm referring to the case where only the variable is shared between scripts like a GAE-Session. (Which uses Cookies, Memcache, etc to share data)
Example: ScriptA & ScriptB, share a session variable. When Script B changes it, SctiptA has to call a method to handle that change.
Use properties. Only mutable values can change to begin with.
class Something(object):
@property
def some_value(self):
return self._actual
@some_value.setter
def some_value(self, value):
print ("some_value changed to", value)
self._actual = value