In Chapter 11, Text Processing, on page 196, I have hit a road block. I cannot make the scipt execute. I have tried it on both Windows 7, and Mac OS-X version 10.9. It seems like something is missing from the text in the book.

The code script is:
import os, os.path
import re

def print_pdf (root, dirs, files):
for file in files:
path = os.path.join (root, file)
path = os.path.normcase (path)
if re.search (r".*\.pdf, path):
print(path)

for root, dirs, files in os.walk('.'):

The text say run the script from here. The ":" at the end of the incomplete for statement block generates errors.
The script on page 198 does not work either.
def print_pdf (arg, dirs, files):
for file in files:
path = os.path.join (root, file)
path = os.path.normcase (path)
if not re.search (r".*\.pdf, path): continue
print (path)

for root, dirs, files in os.walk('.'):

For this script the ":" colon for beginning a for block is the last entry. Also the definition of the function on page 198 has "(arg, dirs, files):" as the argument list, but the for statement at the end is the same as before.
I understand the differences between Windows and Mac OS-X (Unix) file systems, so I have used Unix file designations when trying to work a Unix version. When I submitted these scripts, the editor took out my indentation. Thanks in advance for anyone who can help me here?

It finally dawned on me that after defining a function, it must be called before it can execute, so the missing function call was added. Maybe I don't quite understand the OS-X file structure as well as I thought. This program still will not run on the Mac/Unix, but it DOES run as expected on Windows 7. Still need help with running it on the Mac under Mavericks. Thanks in advance for any insight you may be able to provide me.