WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1074: The handshake operation timed out'))': /simple/js2py/

It looks like you are encountering a connection issue while trying to install the `js2py` package using pip. The error message indicates that there is a problem with the proxy connection.

To resolve this issue, you can try the following steps:

1. Check your internet connection to ensure that it is stable.

2. Disable your proxy settings temporarily and try installing the package again. You can do this by running the following command in your terminal or command prompt:

unset http_proxy https_proxy

3. If the above steps do not work, you can try using a different network or a different proxy server.

4. If the issue persists, you can try installing the package using a different package manager like conda or manually downloading and installing the package.

I hope this helps!