The Right Way to Compare Floats in Python

• NumPy

  272 26,413 10.0 Python

  The fundamental package for scientific computing with Python.

  

An explanation for the atol difference between numpy and math by the author of math.isclose():

https://github.com/numpy/numpy/issues/10161#issuecomment-350...

plus a ton of flogging/benchmarking common libraries (numpy, scipy, scikit-learn)

and also this gem:

  import numpy as np

• game-engine-2d

  9 720 0.0 Lua

  Planimeter Game Engine 2D - LÖVE-based game engine for Lua

  

I remember having to write something similar for Lua, because there was no math.approximately() function and I was dealing with networking floats and comparing values over the wire to predicted movement in 2D space.

https://github.com/Planimeter/grid-sdk/blob/master/engine/sh...

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• LogarithmicNumbers.jl

  1 56 6.0 Julia

  A logarithmic number system for Julia.

• DoubleFloats.jl

  1 144 8.0 Julia

  math with more good bits

  

https://github.com/JuliaMath/DoubleFloats.jl

Of course, if you are calling BLAS/LAPACK, you are constrained to use floats, but the recommendation on DoubleFloats is clear: if you know you algorithms, use the increased precision only in the parts that matter

Suggest a related project