looking up function's doc in emacs

[Andreas Röhler]

Xah Lee wrote:

> in programing elisp in emacs, i can press “Ctrl+h f” to lookup the doc
> for the function under cursor.
> 
> is there such facility when coding in perl, python, php?
> 
> (i'm interested in particular python. In perl, i can work around with
> “perldoc -f functionName”, and in php it's php.net/functionName. Both
> of which i have a elisp command with a shortcut that let me jump to
> the doc)
> 
> Thanks.
> 
>   Xah
> ∑ http://xahlee.org/
> 
> ☄
python help(FUNCTIONNAME)