yum source code

hello,

I want to know about certain variables in source code mainly in files
yumRepo.py and __init__.py

1) What is the variable 'i' for in line 1240 of __init__.py function
and its connection with 'text' variable in line 1272 that follows


2)how are the urls to be tried for urlgrab() obtained in the function
_getFile() of file yumRepo.py

-- 
--Regards
--Pranjal Pandit