尝试通过 pip3 安装 PyQt5 时出现错误。自动消息要我添加更多细节，但我没有。所有细节都在代码中。
? ~ pip3 install PyQt5 --user
Collecting PyQt5
Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7f2c97cfeb50>: Failed to establish a new connection: [Er
rno -2] Name or service not known')': /simple/pyqt5/
Using cached https://files.pythonhosted.org/packages/3a/fb/eb51731f2dc7c22d8e1a63ba88fb702727b324c6352183a32f27f73b8116/PyQt5-5.14.1.tar.gz
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing wheel metadata ... error
Complete output from command /usr/bin/python3 /usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py prepare_metadata_for_build_wheel /tmp/tmp3yjy_ooq:
Traceback (most recent call last):
File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 64, in …