I cannot import beautiful soup on python

I installed Beautiful Soup library, and it seems to be well set up as there is the `bs4` folder in `C:\Python33\Lib\site-packages`. (I changed the name into `bs4` before installation, and it went the same after install) But when I type in `from bs4 import beautifulsoup` in the code, it says there is no such library. And I don't see any `beautifulsoup.py` or something. Isn't there supposed to be one? I'm really confused. Anyone help please?