Express Yourself! Using Exceptions to Convey Information

When properly used, exceptions are a powerful tool for conveying information. Let's take a look at how better exception management can help us avoid some common antipatterns.

Expressive: a new library for compiling symbolic expressions into fast NumPy functions

Introducing a new library which can compile symbolic expressions into fast NumPy functions - I hope it can help widen the bridge between mathematicians and programmers

A SymPy expression or string is accepted along with sample data, then directly used or converted into a loop over the first dimension of those arrays, and finally compiled with Numba's ahead-of-time mode using the types from the data and exposed through the object's `__call__()`

The given sample data can also be …