混沌摆具有相同初始条件的混沌行为

My first post on Stack Overflow, so bear with me. I have built a model of a chaotic double pendulum in python using the pymunk physics library, which in turn uses the chipmunk C library. The pendulum, being chaotic, displays extreme sensitivity to initial conditions. However, I have realized that even if I run the simulation with the exact same initial conditions (changing zero code whatsoever), the two simulations diverge fairly quickly. My first post on Stack Overflow, so bear with m