Missing attribute 'frozen'

[gpxlnx]

Hello,

When running the program the following error occurs:

holehe example@exemple.com
Traceback (most recent call last):
File "/usr/local/bin/holehe", line 11, in
load_entry_point('holehe==1.61', 'console_scripts', 'holehe')()
File "/usr/lib/python3/dist-packages/pkg_resources/init.py", line 490, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python3/dist-packages/pkg_resources/init.py", line 2854, in load_entry_point
return ep.load()
File "/usr/lib/python3/dist-packages/pkg_resources/init.py", line 2445, in load
return self.resolve()
File "/usr/lib/python3/dist-packages/pkg_resources/init.py", line 2451, in resolve
module = import(self.module_name, fromlist=['name'], level=0)
File "/usr/local/lib/python3.8/dist-packages/holehe-1.61-py3.8.egg/holehe/core.py", line 4, in
import trio
File "/usr/local/lib/python3.8/dist-packages/trio-0.22.0-py3.8.egg/trio/init.py", line 76, in
from ._dtls import DTLSEndpoint, DTLSChannel
File "/usr/local/lib/python3.8/dist-packages/trio-0.22.0-py3.8.egg/trio/_dtls.py", line 136, in
@attr.frozen
AttributeError: module 'attr' has no attribute 'frozen'

I installed the package using pip3 install holehe.

Are there any settings or dependencies I need to install?

[ColBreakZ19]

$ pip uninstall attr
$ pip install attrs

Worked for me