There's some explicit differences with Python[1]. My understanding is that Starlark was specifically created for Bazel so if I had to guess it's to enforce the

There's some explicit differences with Python[1]. My understanding is that Starlark was specifically created for Bazel so if I had to guess it's to enforce the immutability of values between contexts. [1] https://bazel.build/rules/language#differences_with_python https://bazel.build/rules/language#differences_with_python