Tim, I had not seen the thread you linked to. I learned something, but it still doesn't explain whatever is happening on my machine. When I run assoc and ftype I get exactly the results you say I need to run the scripts properly. However, this simple script (printargs.py) seems to work whether I type the .py extention or not.
import os import sys print sys.argv print sys.argv[0] print sys.argv[1] print sys.argv[2] Whereas this more complex script (cbfindfiles.py) will NOT work unless I type the .py extension. Otherwise the arguments don't seem to pass. import os import fnmatch import sys def all_files(root, patterns='*', single_level=False, yield_folders=False): """walks the directory tree starting at root and finds all files matching patterns""" # Expand patterns from semicolon-separated string to list patterns = patterns.split(';') for path, subdirs, files in os.walk(root): if yield_folders: files.extend(subdirs) files.sort() for name in files: for pattern in patterns: if fnmatch.fnmatch(name, pattern): yield os.path.join(path, name) break if single_level: break if __name__ == "__main__": for path in all_files(sys.argv[1], sys.argv[2]): print path It's not big deal. I don't mind typing the .py extension. It's just a curious quirk. Thanks for your help. Rick -- http://mail.python.org/mailman/listinfo/python-list