[Tutor] How can isfile really do what it claims

[Sandip Bhattacharya]

$ ls -l /usr/lib/xulrunner/libfreebl3.so
lrwxrwxrwx 1 root root 20 2007-10-20 12:13 /usr/lib/xulrunner/libfreebl3.so -> ../nss/libfreebl3.so

$ python
Python 2.5.1 (r251:54863, Oct  5 2007, 13:36:32) 
[GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os.path
>>> os.path.isfile("/usr/lib/xulrunner/libfreebl3.so")
True
>>> print os.path.isfile.__doc__
Test whether a path is a regular file


Is this because isfile follows symlinks? If that is the case, 
how can I NOT make it do that?

- Sandip