Blender 2.78a - show all installed pyhon modules got errors .

I try to see all python modules from last blender version 2.78a as come from help python command.
I used this commands:

help()
modules

I got errors about python blender installation.
Just the dir() python command works with some output.

This is bug?

Linux:
In Terminal i.e. Ctrl T
$ sudo pip freeze

What is that ? Is not a good answer about Blender application.

Here is the precise answer for your question:
In console of Blender, type this:

>>> import sys
>>> sys.path

You will obtain the directories for blender loaded modules.
Search in this directories.

the issue is about Blender and python …

>>> help()

Welcome to Python 3.5's help utility!

If this is your first time using Python, you should definitely check out
the tutorial on the Internet at http://docs.python.org/3.5/tutorial/.
...
modules", "keywords", "symbols", or "topics".  Each module also comes
with a one-line summary of what it does; to list the modules whose name
or summary contain a given string such as "spam", type "modules spam".


You are now leaving help and returning to the Python interpreter.
If you want to ask for help on a particular object directly from the
interpreter, you can type "help(object)".  Executing "help('string')"
has the same effect as typing a particular string at the help> prompt.

>>> modules
Traceback (most recent call last):
  File "<blender_console>", line 1, in <module>
NameError: name 'modules' is not defined

no , sorry !!!

As you wan’t understand:

I try to see all python modules from last blender version 2.78a

Try it instead of saying no!
Moron!

As I say ( sorry for my aged 40 years)
I don’t need to follow paths and search , I need to use
help() and modules commands under python shell

Yes I can be “Moron!” but I don’t want :no: