Run Processes Sequentially Using Process ID (PID)

Hi,

I'm a newbie when it comes to using UNIX, and I'm hoping someone here can help me out. I have a set of processes that I want to run sequentially:

process1.py
process2.py
process3.py

I want to know I can run these sequentially using their process IDs (PIDs). Ideally, I want to create an alias called "after" so that I can run the processes as follows:

>> process1.py &
>> jobs
[1] 9736 Running process1.py &
>> after 9736 process2.py &

Do you know if there's a command or alias I can use to do this?

Thanks in advance!
~a

Please make use of code tags

 code tags 

List them one after another in a wrapper and it's done. Is that what you are looking for.

Thanks matrixmadhan.

Is there any way to do this via command line and PID, or do I have to use the wrapper? Ultimately, I'd like to run several processes in parallel, and then based on their PID, run sequential processes off of each parallelized process.