Pendulum physics

I made a simulation of a simple pendulum in python. I used newtonian physics and allow for initial velocity, initial radians and radius to be changed before simulation starts. I plot the pendulum on a matplotlib graph. This project was very hard as it was my first main project on python and I had to figure out the alpha = -g/lsintheta line. This was done by learning circular motion and simple pendulum physics; getting the relationship of tangential acceleration to angular acceleration and combining this with the -mgsintheta = ma (newtonian) to get a = -g/lsintheta. This was the main part of the project, however managing theta continued to be a big problem throughout the project. I did enjoy this and I will probably be sticking with python for a while now.