Why doesn't response pydoc on my Python 2.7?

[Robert]

On Saturday, December 12, 2015 at 6:02:11 PM UTC-5, Robert wrote:
> Hi,
> 
> I want to use pydoc as some online tutorial shows, but it cannot run as 
> below. What is wrong?
> 
> 
> Thanks,
> 
> 
> 
> 
> >>> import pydoc
> >>> pydoc
> <module 'pydoc' from 'C:\Python27\lib\pydoc.pyc'>
> >>> pydoc sys
> SyntaxError: invalid syntax
> >>> import sys
> >>> pydoc sys
> SyntaxError: invalid syntax
> >>> help(pydoc)
> Help on module pydoc:
> ......

In fact, I wanted to run the following code. When it failed, I moved to
the original question above.

Anyone can help? Thanks,

//////////
It also changes what pydoc will show:

module1.py

a = "A"
b = "B"
c = "C"
module2.py

__all__ = ['a', 'b']

a = "A"
b = "B"
c = "C"
$ pydoc module1