Function spawn_repl

Lib/test/test_repl.py:31–64

Run the Python REPL with the given arguments. kw is extra keyword args to pass to subprocess.Popen. Returns a Popen object.

(*args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, custom=False, isolated=True, **kw)

def spawn_repl(*args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, custom=False, isolated=True, **kw):
    """Run the Python REPL with the given arguments.

    kw is extra keyword args to pass to subprocess.Popen. Returns a Popen
    object.
    """

    # To run the REPL without using a terminal, spawn python with the command
    # line option '-i' and the process name set to '<stdin>'.
    # The directory of argv[0] must match the directory of the Python
    # executable for the Popen() call to python to succeed as the directory
    # path may be used by PyConfig_Get("module_search_paths") to build the
    # default module search path.
    stdin_fname = os.path.join(os.path.dirname(sys.executable), "<stdin>")
    cmd_line = [stdin_fname]
    # Isolated mode implies -EPs and ignores PYTHON* variables.
    if isolated:
        cmd_line.append('-I')
    # Don't re-run the built-in REPL from interactive mode
    # if we're testing a custom REPL (such as the asyncio REPL).
    if not custom:
        cmd_line.append('-i')
    cmd_line.extend(args)

    # Set TERM=vt100, for the rationale see the comments in spawn_python() of
    # test.support.script_helper.
    env = kw.setdefault('env', dict(os.environ))
    env['TERM'] = 'vt100'
    return subprocess.Popen(cmd_line,
                            executable=sys.executable,
                            text=True,
                            stdin=subprocess.PIPE,
                            stdout=stdout, stderr=stderr,
                            **kw)


spawn_asyncio_repl = partial(spawn_repl, "-m", "asyncio", custom=True)