Circular import error around scapy.sendrecv

[PeterisP]

Brief description

I'm trying to apply scripts that rely on scapy and include a line from scapy.layers.bluetooth import HCI_Hdr, HCI_PHDR_Hdr which triggers

ImportError: cannot import name 'send' from partially initialized module 'scapy.sendrecv' (most likely due to a circular import) (/usr/local/lib/python3.9/site-packages/scapy/sendrecv.py)

Scapy version

2.4.5

Python version

3.9

Operating system

OS X 11.6

Additional environment information

I attempted both the pip 2.4.5 version and the latest source from github (2.4.5rc1.dev137), with identical results.

How to reproduce

1. Open python3
   2a. Enter from scapy.layers.bluetooth import HCI_Hdr, HCI_PHDR_Hdr
   2b. Alternatively, enter from scapy.sendrecv import sndrcv
   2c. Alternatively, enter from scapy.sendrecv import send, sniff

Actual result

Traceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python3.9/site-packages/scapy/layers/bluetooth.py", line 47, in
from scapy.sendrecv import sndrcv
File "/usr/local/lib/python3.9/site-packages/scapy/sendrecv.py", line 61, in
import scapy.route # noqa: F401
File "/usr/local/lib/python3.9/site-packages/scapy/route.py", line 218, in
conf.route = Route()
File "/usr/local/lib/python3.9/site-packages/scapy/route.py", line 37, in init
self.resync()
File "/usr/local/lib/python3.9/site-packages/scapy/route.py", line 45, in resync
from scapy.arch import read_routes
File "/usr/local/lib/python3.9/site-packages/scapy/arch/init.py", line 124, in
from scapy.arch.bpf.supersocket import * # noqa F403
File "/usr/local/lib/python3.9/site-packages/scapy/arch/bpf/supersocket.py", line 27, in
from scapy.layers.l2 import Loopback
File "/usr/local/lib/python3.9/site-packages/scapy/layers/l2.py", line 17, in
from scapy.ansmachine import AnsweringMachine
File "/usr/local/lib/python3.9/site-packages/scapy/ansmachine.py", line 20, in
from scapy.sendrecv import send, sniff
ImportError: cannot import name 'send' from partially initialized module 'scapy.sendrecv' (most likely due to a circular import) (/usr/local/lib/python3.9/site-packages/scapy/sendrecv.py)

Expected result

No response

Related resources

No response

[gpotter2]

The stack trace you quoted is not from the latest dev version, could you give an up to date error log?
Thanks

[PeterisP]

I'm sorry, it apparently does work properly with the 2.4.5rc1.dev137 version, it looks like that previously I accidentally ran the 2.4.5 pip distribution both times. So the issue is apparently fixed now.

[gpotter2]

That's what I thought :) We added a special test to make sure import loops never happen again