CGI redirection: let us discuss it further

[Sullivan WxPyQtKinter]

I am now programming python scripts for CGI environment. The
redirection has been discussed in this forum for over one hundred
times. I have seen most of them, but still have some questions:

1. Are there any method (in python of course) to redirect to a web page
without causing a "Back" button trap(ie, when user click the back
button on their web browser, they are redirect to their current page,
while their hope is probably to go back to the last page they have
seen, rather than the redirection page with a "Location: url" head and
blank content.)?

2. Are there any method to use relative path, rather than full absolute
URI path in "Location: url"? It is very essential for later transplant
work, e.g.,transplant a folder of cgi scripts from one web server to
another, with different URL.

Thank you.