how to remove the punctuation and no need words from paragraphs

[kylin]

I want to remove all the punctuation and no need words form a string
datasets for experiment.

I am new to python, please give me some clue and direction to write
this code.

 

[Chris Rebert]

I want to remove all the punctuation and no need words form a string
datasets for experiment.

I am new to python, please give me some clue and direction to write
this code.

The `replace` method of strings should get you pretty far (just
replace unwanted stuff with the empty string):
http://docs.python.org/library/stdtypes.html#str.replace

Cheers,
Chris