python3-bottleneck 1.3.5+ds1-2 (amd64 binary) in ubuntu lunar

 Bottleneck is a collection of fast NumPy array functions written in C.
 .
 Only arrays with data type (dtype) int32, int64, float32, and float64 are
 accelerated. All other dtypes result in calls to slower, unaccelerated
 functions.
 .
 This package provides the modules for Python 3.