Manas Manohar wrote:I am trying to make a security cam for my house using raspberry pi B+....
It would be very nice if you could help me out with the python programme

.....
The features which i want on the programme are-
*It should be able to broadcast live videos
* It should alert us when a intruder comes at home
*We should be able to talk to the intruder ...so that we can ask what he wants and be able to hear what he says...

Is that all?
Personally, I think you need to do far more work yourself before expecting other people to start helping out.
How much python do you know? If you know nothing then it seems ridiculous to try and jump into a project of this size already. You'll need to learn the basics of python first (there are plenty of threads in this forum about getting started).
Once you know a bit of python then break your requirements down into individual components and try and get each one working (if you've got some code already then post it here so we can offer specific help).
Also have a search on the forum for your requirements because I suspect a lot of them have been asked before.
I'm not trying to be unhelpful but, in my opinion, the Pi is about helping people to learn how to code and not about buying a piece of hardware and getting other people to give you the code. Granted, the learning is a two-way process but from your post it's hard to tell if you've made any effort so far.