How can I receive data blocks from a python server?

I desgined a "Python server API" that sends data in a for loop. For example there are 5 datablocks, the sending method is

1st Iteration

Datablock1....sent

2nd Iteration

Datablock2....sent

3rd Iteration

Datablock3....sent

4th Iteration

Datablock4....sent

5th Iteration

Datablock5....sent

Now if the client side is designed on pyhthon itself then this is easy and is able to process directly. The sockets behave good. But if the client side is Matlab then I dont receive data in iteration but rather like this:

Datablock1....sentDatablock2....sentDatablock3....sentDatablock4....sentDatablock5....sent

There are no Delimaters in this format. Now I want to process everytime I receive data. How can I do this?