为python3.8.1安装pyqt5时出现的问题
C:\Users\86135>pip install pyqt5 Collecting pyqt5 Downloading https://files.pythonhosted.org/packages/46/83/7c27aec708a1eb12812a0b985eb42eebfe3bb87e294cdca1c4af308d2fa9/PyQt5-5.14.1-5.14.1-cp35.cp36.cp37.cp38-none-win_amd64.whl (53.1MB) | | 204kB 6.2kB/s eta 2:22:38ERR