What is the difference between os.path.basename() and os.path.dirname()?

I'm new in Python programming and while studying I had this doubt about this two functions. I already searched for answers and read some links, but didn't understood. Can anyone give some simple explanation?

Both functions use the os.path.split(path) function to split the pathname path into a pair; (head, tail).

The os.path.dirname(path) function returns the head of the path.

E.g.: The dirname of '/foo/bar/item' is '/foo/bar'.

The os.path.basename(path) function returns the tail of the path.

E.g.: The basename of '/foo/bar/item' returns 'item'

From: http://docs.python.org/2/library/os.path.html#os.path.basename

From: stackoverflow.com/q/22272003