~/webrtc/src$ gn gen out/Release “–args=is_debug=false”
Traceback (most recent call last):
File “/usr/lib/python2.7/site.py”, line 68, in
import os
File “/usr/lib/python2.7/os.py”, line 400, in
import UserDict
File “/usr/lib/python2.7/UserDict.py”, line 116, in
import _abcoll
File “/usr/lib/python2.7/_abcoll.py”, line 11, in
from abc import ABCMeta, abstractmethod
File “/usr/lib/python2.7/abc.py”, line 8, in
from _weakrefset import WeakSet
ImportError: No module named _weakrefset

这是什么问题，ubuntu20.04 python2.7