I have the following python code using the twisted API.
def function(self,filename):
def results(result):
//do something
for i in range(int(numbers)) :
name = something that has to do with the value of i
df = function_which_returns_a defer(name)
df.addCallback(results)
It uses the Twisted API. What i want to achieve is to pass to the callbacked function (results) the value of the name which is constructed in every iteration without changing the content of the functions_which_returns_a defer() function along with the deferred object of course. In every result of the functions_which_returns_a deffer the value of the name should be passed to results() to do something with this. I.e: at the first iteration when the execution reach the results function i need the function hold the result of the deffered object along with the value of name when i=0,then when i=1 the defered object will be passed with the value of name, and so on.So i need every time the result of the defer object when called with the name variable alond with the name variable. When i try to directly use the value of nameinside results() it holds always the value of the last iteration which is rationale, since function_which_returns_a defer(name) has not returned.
You can pass extra arguments to a Deferred
callback at the Deferred.addCallback
call site by simply passing those arguments to Deferred.addCallback
:
def function(self,filename):
def results(result, name):
# do something
for i in range(int(numbers)) :
name = something that has to do with the value of i
df = function_which_returns_a defer(name)
df.addCallback(results, name)
You can also pass arguments by keyword:
df.addCallback(results, name=name)
All arguments passed like this to addCallback
(or addErrback
) are passed on to the callback function.