Function check_output

Lib/test/test_venv.py:50–66

(cmd, encoding=None)

@requires_subprocess()
def check_output(cmd, encoding=None):
    p = subprocess.Popen(cmd,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
        env={**os.environ, "PYTHONHOME": ""})
    out, err = p.communicate()
    if p.returncode:
        if verbose and err:
            print(err.decode(encoding or 'utf-8', 'backslashreplace'))
        raise subprocess.CalledProcessError(
            p.returncode, cmd, out, err)
    if encoding:
        return (
            out.decode(encoding, 'backslashreplace'),
            err.decode(encoding, 'backslashreplace'),
        )
    return out, err

class BaseTest(unittest.TestCase, ExtraAssertions):
    """Base class for venv tests."""