What is the best stemming method in Python?

I tried all the nltk methods for stemming but it gives me weird results with some words.

Examples

It often cut end of words when it shouldn't do it :

• poodle => poodl
• article articl

or doesn't stem very good :

• easily and easy are not stemmed in the same word
• leaves, grows, fairly are not stemmed

Do you know other stemming libs in python, or a good dictionary?

Thank you

Python implementations of the Porter, Porter2, Paice-Husk, and Lovins stemming algorithms for English are available in the stemming package