It's hard, and people are lazy. Getting this information out of Java is Really Really Easy, so it's been done.

Personally, I have all the pieces together for doing this with Perl, but I have not put it together into anything coherent because it's largely useless. An occasionally-updated tags table is really all I need, so I can't get motivated to make "Eclipse for Perl".

Maybe someone else that sees the value in these tools will do it. Let me know what information you're interested in, and I will show you how to implement it.

For Python Netbeans/WingIDE/PyCharm do this good enough.