找不到满足PyQt4要求的版本

Question

我想为Pycharm使用PyQt4

PIP版本19.2.3 在安装PyQt4_windows_whl时 “错误：找不到满足PyQt4_windows_whl要求的版本（从版本：无）”

命令输出为：

Collecting PyQt4_windows_whl

ERROR: Could not find a version that satisfies the requirement PyQt4_windows_whl (from versions: none)
ERROR: No matching distribution found for PyQt4_windows_whl