Question

In the lec9 ,there is a function sort(L,it = lambda x,y:x 13 years ago

Answer 1

which course? OCW 2008, 2011 ? EDx2013?

use a code pasting site and post the whole function along with any lines that call it.

http://dpaste,com

Answer 2

Without more it has hard to say exactly but I am guess the lambda part is the problem. It creates an anonymous (no name) function that takes two arguments and returns true or false. Here is an example.

>>> it = lambda x,y:x<y
>>> it
<function <lambda> at 0x02974A30>
>>> it(3, 4)
True
>>> it(4,3)
False

Answer 3

sort( L, it = lambda x,y:x<y ):

looks to be a sort function being passed either a list, or a list and a comparison function that returns either True of False ( equal should be interesting! ). If no comparison function is passed, the lambda will be used.