python-starlark-go
Introduction
This module provides Python bindings for the Starlark programming language.
Starlark is a dialect of Python designed for hermetic execution and deterministic evaluation. That means you can run Starlark code you don’t trust without worrying about it being able access any data you did not explicitly supply to it, and that you can count on the same code to always produce the same value when used with the same input data. Starlark was originally created for the Bazel build system. There are now several implementations of Starlark; this module is built on starlark-go.
This module was originally forked from Kevin Chung’s pystarlark.
The version of starlark-go that is currently embedded in this module is v0.0.0-20230302034142-4b1e35fe2254.
Features
Evalutes Starlark code from Python
Translates Starlark exceptions to Python exceptions
Converts Starlark values to Python values
Converts Python values to Starlark values
No runtime dependencies - cgo is used to bundle starlark-go into a Python extension
Installation
pip install starlark-go
Usage
from starlark_go import Starlark
s = Starlark()
fibonacci = """
def fibonacci(n=10):
res = list(range(n))
for i in res[2:]:
res[i] = res[i-2] + res[i-1]
return res
"""
s.exec(fibonacci)
s.eval("fibonacci(5)") # [0, 1, 1, 2, 3]
s.set(x=5)
s.eval("x") # 5
s.eval("fibonacci(x)") # [0, 1, 1, 2, 3]