如何在bazel中为Python和pip选择运行时？

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

# 下载并导入rules_python扩展
http_archive(
    name = "io_bazel_rules_python",
    urls = ["https://github.com/bazelbuild/rules_python/archive/0.3.1.tar.gz"],
    sha256 = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
)

load("@io_bazel_rules_python//python:pip.bzl", "pip_repositories")

# 添加pip依赖库
pip_repositories()

# 导入rules_python扩展
load("@io_bazel_rules_python//python:pip.bzl", "pip_import")

# 导入Python运行时
pip_import(
    name = "python_runtime",
    requirements = "//path/to/requirements.txt",
)

load("@io_bazel_rules_python//python:defs.bzl", "py_binary")

py_binary(
    name = "my_python_program",
    srcs = ["my_python_program.py"],
    deps = [
        "@python_runtime//:requirements",
    ],
)

bazel run //:my_python_program