No, there are no problems with filesystem. You can read
TXT file as a whole and save it in variable, or you can read
text as a list - in that case every line from TXT document
becomes new item in list variable, so you need to treat it
as a list and use list module to manipulate it.
@vanux So can I do something so that site won't detect me if I use 20 threads with http client?
I'm currently only using http-proxy function on each thread.