readme for challenges
readme for challenges

tomviner/python-conference-beginners-day,ntoll/python-conference-beginners-day,teglanna/python-conference-beginners-day,mtkocak/python-conference-beginners-day,hjwp/python-conference-beginners-day,Eleonore9/python-conference-beginners-day,jamesbroadhead/python-conference-beginners-day