Python Pocket Reference, 3rd Edition by Mark Lutz The unconfirmed error reports are from readers. They have not yet been approved or disproved by the author or editor and represent solely the opinion of the reader. Here's a key to the markup: [page-number]: serious technical mistake {page-number}: minor technical mistake : important language/formatting problem (page-number): language change or minor formatting problem ?page-number?: reader question or request for clarification This page was updated June 18, 2008. UNCONFIRMED errors and comments from readers: {109} last paragraph; Typo in the last sentence of page 109: reference to "os.path.walk" should read "os.walk". Current text: See also the os.path.walk generator earlier in this book, in the section "File Pathname Tools." Corrected text: See also the os.walk generator earlier in this book, in the section "File Pathname Tools." (143)N section of index; missing index entry for "not" Python keyword