Function ensure_python_venv

testing/__init__.py:795–818

(
    version,  # type: str
    latest_pip=True,  # type: bool
    system_site_packages=False,  # type: bool
    tmpdir=None,  # type: Optional[Tempdir]
)

def ensure_python_venv(
    version,  # type: str
    latest_pip=True,  # type: bool
    system_site_packages=False,  # type: bool
    tmpdir=None,  # type: Optional[Tempdir]
):
    # type: (...) -> Virtualenv
    pyenv_distribution = ensure_python_distribution(version)
    venv = tmpdir.join("{version}.venv".format(version=version)) if tmpdir else safe_mkdtemp()
    if _ALL_PY_VERSIONS_TO_VERSION_INFO[version][0] == 3:
        args = [pyenv_distribution.binary, "-m", "venv", venv]
        if system_site_packages:
            args.append("--system-site-packages")
        subprocess.check_call(args=args)
    else:
        subprocess.check_call(args=[pyenv_distribution.pip, "install", "virtualenv==16.7.10"])
        args = [pyenv_distribution.binary, "-m", "virtualenv", venv, "-q"]
        if system_site_packages:
            args.append("--system-site-packages")
        subprocess.check_call(args=args)
    python, pip = tuple(os.path.join(venv, "bin", exe) for exe in ("python", "pip"))
    if latest_pip:
        subprocess.check_call(args=[pip, "install", "-U", "pip"])
    return Virtualenv(venv)


def ensure_python_interpreter(version):