PyTensor is a fork of Aesara - a Python library that allows one to define, optimize, and efficiently evaluate mathematical expressions involving multi-dimensional arrays. Features: * A hackable, pure-Python codebase * Extensible graph framework suitable for rapid development of custom operators and symbolic optimizations * Implements an extensible graph transpilation framework that currently provides compilation via C, JAX, and Numba * Based on one of the most widely-used Python tensor libraries: Theano