当我在python3中运行import cv2时，我收到以下错误：
This program was compiled against version 2.6.1 of the Protocol Buffer
runtime library, which is not compatible with the installed version
(3.1.0). Contact the program author for an update. If you compiled
the program yourself, make sure that your headers are from the same
version of Protocol Buffers as your link-time library. (Version
verification failed in "/build/mir-ui6vjS/mir-
0.26.3+16.04.20170605/obj-x86_64-linux-
gnu/src/protobuf/mir_protobuf.pb.cc".)
terminate called after throwing an instance of
'google::protobuf::FatalException'
what(): This program was compiled against version 2.6.1 of the
Protocol Buffer runtime library, which is not compatible with the
installed version (3.1.0). Contact the program author for an update.
If you compiled the program yourself, make sure that your headers are
from the same version of Protocol Buffers as your link-time library.
(Version verification failed in "/build/mir-ui6vjS/mir-
0.26.3+16.04.20170605/obj-x86_64-linux-
gnu/src/protobuf/mir_protobuf.pb.cc".)
Aborted (core dumped)
我查了here，它说我需要更新我的头文件。我该怎么做呢？
这样做的命令是什么？