Raspberry Pi 3+ Python + Blynk=> how it works?

Hi~ I am a newie in Blynk &Raspberry Pi 3 &Python.

I am working IoT Project with my friends.
We want to make a monitoring Device by Raspi 3 and control it on Blynk.
I take part on mobile App, but have no experience to make some Apps, so that`s why I choose Blynk.

The problem is I have no idea how to connect python source code to Blynk.
My friends have source code for Camera monitoring+ noticing for moving function by Python.

I am little bit confused that we do not need to coding if using Blynk, but in my case, we use our own source code for monitoring function. In That case is it possible to use Blynk app.