Connect from another python process rather than the VSCode debugger #1186

Hi,

I was wondering if one could connect to the debugger, using either the debupy cli or another python script, rather than VSCode.

Using:

• debugpy version: 1.6.5
• OS and version: macOS 11.6
• Python version Python 3.10.9
• VS Code or shell

I am running
listen.py

import debugpy

debugpy.listen(("localhost", 5678))
debugpy.wait_for_client()
debugpy.breakpoint()

and try to connect via

import debugpy

debugpy.connect(('localhost', 5678))
debugpy.wait_for_attach()
debugpy.breakpoint()

Will get me this error

Traceback (most recent call last):
  File "/Users/user/Dev/rez_dev/py310/lib/python3.10/site-packages/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_comm.py", line 252, in _on_run
    self.process_net_command_json(self.py_db, json_contents)
  File "/Users/user/Dev/rez_dev/py310/lib/python3.10/site-packages/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_process_net_command_json.py", line 172, in process_net_command_json
    assert request.type == 'request'
AssertionError

When trying to connect via

python -m debugpy --connect 5678 --pid 24017

I am getting another longer error.

Is this a trivial question ? Or would you expect this to be working without using any VSCode ?
It works fine when connecting via VSCode, as described in the docs.