The problem Pythondrwaing solves

Allows user to draw/write anything out of the it imagination anytime.
Mostly it is useful to the handicapped people. People who cannot talk and uses hand-gestures for communication, now can easily write they wanted to tell.
If used wisely can make education more interesting and we can do much more cool things out of it

Challenges we ran into

While making the project from scratch we ran to many challenges, some of them are :

while working with the old open-cv version we faced some difficulties. But eventually we upgraded it
secondly working with the centre of detecting circles we faced some challenges like it was not detecting properly
finally there was problem in detecting the fingers for drawing.
Although we faced some challenges but at the end of the day it payed off