How can I solve this problem?
Please help
ryu-user@ryu-controller:~/ryu/ryu/app$ sudo ryu run simple_switch.py
Traceback (most recent call last):
File "/usr/bin/ryu", line 11, in <module>
load_entry_point('ryu==4.30', 'console_scripts', 'ryu')()
File "/usr/lib/python3/dist-packages/ryu/cmd/ryu_base.py", line 72, in
main
subcmd_mod = utils.import_module(subcmd_mod_name)
File "/usr/lib/python3/dist-packages/ryu/utils.py", line 108, in
import_module
return importlib.import_module(modname)
File "/usr/lib/python3.8/importlib/__init__.py", line 127, in
import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 848, in exec_module
File "<frozen importlib._bootstrap>", line 219, in
_call_with_frames_removed
File "/usr/lib/python3/dist-packages/ryu/cmd/manager.py", line 33, in
<module>
from ryu.app import wsgi
File "/usr/lib/python3/dist-packages/ryu/app/wsgi.py", line 109, in
<module>
class _AlreadyHandledResponse(Response):
File "/usr/lib/python3/dist-packages/ryu/app/wsgi.py", line 111, in
_AlreadyHandledResponse
from eventlet.wsgi import ALREADY_HANDLED
ImportError: cannot import name 'ALREADY_HANDLED' from 'eventlet.wsgi'
(/usr/local/lib/python3.8/dist-packages/eventlet/wsgi.py)
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