It is common knowledge that floating point numbers (`float`) are tricky. When misused, floats may lead to construction disaster - I will mention some notable accidents. But mainly, I will dig the topic from Python interface and rounding methods (`int` vs `round`, `divmod`, `math` library), via special symbols (`NaN`, `Inf`, `-0.0`, …), invoking different processor modes (`FLT_ROUNDS`), down to the bits of IEEE 754 standard. --------------------- About the speaker(s): Cloud Evangelist, Python trainer and programmer (since 2008). Warsaw Python community member. Author of patents in Orange Labs. Linux and Open Source proponent.