---- Satchidanand Haridas (sharidas at zeomega dot com) ZeOmega (www.zeomega.com) Open Minds' Open Solutions
Sean Berry wrote: >"Paul Rubin" <http://[EMAIL PROTECTED]> wrote in message >news:[EMAIL PROTECTED] > > >>"Sean Berry" <[EMAIL PROTECTED]> writes: >> >> >>>myList = [[value1, value2, value3],[value1, value2, value3], ...] >>> >>>I have a function which takes value3 from the lists above and returns >>>another value. I want to use this returned value to sort the lists. >>> >>>So, my resultant list would be ordered by the return value of the >>>function with value3 as its argument. >>> >>>From a relative Python newb, what is the best way to do this? >>> >>> >>def get_key(x): return x[2] >>sorted_list = sorted(myList, key=get_key) >> >> > >Sorry if I am missing something. But. what is sorted here? > >My simplified function looks like this > >def myFunction( myNumber ): > "do some math calculations to myNumber" > return "result of calculations" > >So, I want to sort myList by the return of myFunction( value3 ) > >I tried doing the following... with no luck so far >myList.sort(lambda x, y: cmp(myFunction(x[2]), myFunction(y[2])) > > > I think the above statement should be as follows: myList.sort(lambda x, y: cmp(myFunction(x[2]) - myFunction(y[2])) hope that helps. regards, Satchit -- http://mail.python.org/mailman/listinfo/python-list
