How to search help using python console

Question

Is there any way to search for a particular package/function using keywords in the Python console?

For example, I may want to search \"pdf\" for pdf related tasks.

Answer 1

Thinking recursively:

>>> help(help)

Help on _Helper in module site object:

class _Helper(builtins.object)
 |  Define the builtin 'help'.
 |  This is a wrapper around **pydoc.help** (with a twist).
 |  

...

from here:

>>> import pydoc
>>> help(pydoc)
Help on module pydoc: ....

lots of essential info on search in python docs there.