无法在Pycharm中安装PyQT5

如何解决无法在Pycharm中安装PyQT5

我在Pycharm中创建了一个新项目和一个新虚拟环境。
我选择了pythonw.exe来执行程序。
如果我想安装PyQt5软件包，则会得到以下输出：

Could not fetch URL https://pypi.org/simple/pyqt5/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org',port=443): Max retries exceeded with url: /simple/pyqt5/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org',port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping

WARNING: pip is configured with locations that require TLS/SSL,however the ssl module in Python is not available.
WARNING: retrying (Retry(total=4,connect=None,read=None,redirect=None,status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pyqt5/
WARNING: retrying (Retry(total=3,status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pyqt5/
WARNING: retrying (Retry(total=2,status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pyqt5/
WARNING: retrying (Retry(total=1,status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pyqt5/
WARNING: retrying (Retry(total=0,status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pyqt5/
ERROR: Could not find a version that satisfies the requirement PyQt5 (from versions: none)
ERROR: No matching distribution found for PyQt5
WARNING: pip is configured with locations that require TLS/SSL,however the ssl module in Python is not available.

如何解决此问题？