Django channels tutorial issue

Question

As I am following the Django channels tutorial (here is the link: https://channels.readthedocs.io/en/latest/tutorial/part_2.html ), I won't post any code except the specific problem I am having.
In my code for the chat/routing.py, I have:

from django.urls import re_path
from . import consumers
websocket_urlpatterns = [
 re_path(r'ws/chat/(?P<room_name>\w+)/$', consumers.ChatConsumer.as_asgi()),
]

which seems to be identical to that which is given in the tutorial. Trying both single and double quotes, I get the error:

SyntaxWarning: invalid escape sequence '\w'
 r"ws/chat/(?P<room_name>\w+)/$", consumers.ChatConsumer.as_asgi()

Everything I can find says one is supposed to pre-pend the r to make the expression a regular expression, but clearly I have done so to no effect. What am I doing wrong? Have I missed something? I have copied the line from the tutorial and compared it to mine and it is identical. Thanks in advance.

• anupsabraham: My best guess is that you're looking at the wrong place. To verify this, you can try changing \w to \d(or something else) and see if the warning still says \w.
• Dmitry Leiko: This question is similar to: How to fix "SyntaxWarning: invalid escape sequence" in Python?. If you believe it’s different, please edit the question, make it clear how it’s different and/or how the answers on that question are not helpful for your problem.
• sahasrara62: use \\w+ , so change to re_path(r"ws/chat/(?P<room_name>\\w+)/$", consumers.ChatConsumer.as_asgi())
• John Gordon: @sahasrara62 Inside of a raw string, \\w would have two actual backslashes, which would not be correct in this context.
• Brian Ketelboeter: @DmitryLeiko: my question differs from the one you mention because I have pre-pended the r character. As I mentioned, this is the only solution I have found, and I get the error even with it.