VS Code new python extension will break python new repl

[yihong0618]

now in VS Code with latest python extension we can not
go to the new repl....

see the png

and it seems use the ms VS Code Python...

➜ cpython git:(main) ./python.exe
Python 3.15.0a0 (heads/main:3e06cfcaee, Sep 16 2025, 20:15:43) [Clang 17.0.0 (clang-1700.0.13.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
Cmd click to launch VS Code Native REPL

breakpoint()
(1)()
(Pdb) n
--Return--
(1)()->None
(Pdb) n
--Call--
/Users/yihong/Library/Application Support/Code/User/workspaceStorage/27f79048bd19b5492140f86c94b13ec5/ms-python.python/pythonrc.py(48)str()
-> def str(self):
(Pdb) ll
48 -> def str(self):
49 exit_code = int(bool(self.hooks.failure_flag))
50 self.hooks.failure_flag = False
51 # Guide following official VS Code doc for shell integration sequence:
52 result = ""
53 # For non-windows allow recent_command history.
54 if sys.platform != "win32":
55 result = "{command_executed}{command_line}{command_finished}{prompt_started}{prompt}{command_start}".format(
56 command_executed="\x1b]633;C\x07",
57 command_line="\x1b]633;E;" + str(get_last_command()) + "\x07",
58 command_finished="\x1b]633;D;" + str(exit_code) + "\x07",
59 prompt_started="\x1b]633;A\x07",
60 prompt=original_ps1,
61 command_start="\x1b]633;B\x07",
62 )
63 else:
64 result = "{command_finished}{prompt_started}{prompt}{command_start}{command_executed}".format(
65 command_finished="\x1b]633;D;" + str(exit_code) + "\x07",
66 prompt_started="\x1b]633;A\x07",
67 prompt=original_ps1,
68 command_start="\x1b]633;B\x07",
69 command_executed="\x1b]633;C\x07",
70 )
71
72 # result = f"{chr(27)}]633;D;{exit_code}{chr(7)}{chr(27)}]633;A{chr(7)}{original_ps1}{chr(27)}]633;B{chr(7)}{chr(27)}]633;C{chr(7)}"
73
74 return result
(Pdb)

uninstall VS Code Python extension it goes into normal

---

test main and python3.14 and python3.13

and this is my python extension version
I am not quite sure when it break the new repl

[yihong0618]

the ms python extension hook code

import platform
import sys

if sys.platform != "win32":
    import readline

original_ps1 = ">>> "
is_wsl = "microsoft-standard-WSL" in platform.release()


class REPLHooks:
    def __init__(self):
        self.global_exit = None
        self.failure_flag = False
        self.original_excepthook = sys.excepthook
        self.original_displayhook = sys.displayhook
        sys.excepthook = self.my_excepthook
        sys.displayhook = self.my_displayhook

    def my_displayhook(self, value):
        if value is None:
            self.failure_flag = False

        self.original_displayhook(value)

    def my_excepthook(self, type_, value, traceback):
        self.global_exit = value
        self.failure_flag = True

        self.original_excepthook(type_, value, traceback)


def get_last_command():
    # Get the last history item
    last_command = ""
    if sys.platform != "win32":
        last_command = readline.get_history_item(readline.get_current_history_length())

    return last_command


class PS1:
    hooks = REPLHooks()
    sys.excepthook = hooks.my_excepthook
    sys.displayhook = hooks.my_displayhook

    # str will get called for every prompt with exit code to show success/failure
    def __str__(self):
        exit_code = int(bool(self.hooks.failure_flag))
        self.hooks.failure_flag = False
        # Guide following official VS Code doc for shell integration sequence:
        result = ""
        # For non-windows allow recent_command history.
        if sys.platform != "win32":
            result = "{command_executed}{command_line}{command_finished}{prompt_started}{prompt}{command_start}".format(
                command_executed="\x1b]633;C\x07",
                command_line="\x1b]633;E;" + str(get_last_command()) + "\x07",
                command_finished="\x1b]633;D;" + str(exit_code) + "\x07",
                prompt_started="\x1b]633;A\x07",
                prompt=original_ps1,
                command_start="\x1b]633;B\x07",
            )
        else:
            result = "{command_finished}{prompt_started}{prompt}{command_start}{command_executed}".format(
                command_finished="\x1b]633;D;" + str(exit_code) + "\x07",
                prompt_started="\x1b]633;A\x07",
                prompt=original_ps1,
                command_start="\x1b]633;B\x07",
                command_executed="\x1b]633;C\x07",
            )

        # result = f"{chr(27)}]633;D;{exit_code}{chr(7)}{chr(27)}]633;A{chr(7)}{original_ps1}{chr(27)}]633;B{chr(7)}{chr(27)}]633;C{chr(7)}"

        return result


if sys.platform != "win32" and (not is_wsl):
    sys.ps1 = PS1()

if sys.platform == "darwin":
    print("Cmd click to launch VS Code Native REPL")
else:
    print("Ctrl click to launch VS Code Native REPL")

[yihong0618]

its a VS Code issue so closing this

microsoft/vscode-python#25242