convert n-byte string into integer

[Maligree]

Hello there.

Since this is one of those problems that may have some painfully
simple solution that will make me feel like a fool, I'll start of with
this: it's _very_ late (.. yeah, it's not).

To the point.

Data returned by socket.recvfrom is a string. Obviously one that most
of the time will contain non-printable characters. Let's say
data[10:14] is a four byte integer. How can I convert the string
data[10:14] to a python integer object?

Or perhaps there's a totally different, *Pythonic*, approach to this
(extracting data from these packet-representing strings). C may have
poisoned my mind.

Thanks for reading, hoping for some ideas.