Python glob multiple filetypes

Maybe there is a better way, but how about:

import glob
types = ('*.pdf', '*.cpp') # the tuple of file types
files_grabbed = []
for files in types:
    files_grabbed.extend(glob.glob(files))

# files_grabbed is the list of pdf and cpp files

Perhaps there is another way, so wait in case someone else comes up with a better answer.

glob returns a list: why not just run it multiple times and concatenate the results?

from glob import glob
project_files = glob('*.txt') + glob('*.mdown') + glob('*.markdown')