introduction to include outside reference material this is especially true for low-level system and networking modules in which effective use of module normally relies on myriad of options listed in manuals and outside references in additionin order to produce more concise referencea number of deprecated and relatively obscure library modules have been omitted in writing this bookit has been my goal to produce reference containing virtually everything have needed to use python and its large collection of modules although this is by no means gentle introduction to the python languagei hope that you find the contents of this book to be useful addition to your programming reference library for many years to come welcome your comments david beazley chicagoillinois june lib fl ff