the end like the first part of this bookthis last part is single this time short one to provide some parting context this discusses python' roles and scope it explores some of the broader ideas of python' common roleswith the added perspective afforded by the rest of the book much of this is philosophical in naturebut it underscores some of the main reasons for using tool like python note that there are no reference appendixes here for additional reference resourcesconsult the python standard manuals available online or commercially published reference bookssuch as 'reilly' python pocket reference and others you can find in the usual places on the web for additional python core language materialsee 'reilly' learning python among other thingsthe fourth edition of that book also explores more advanced api construction tools such as propertiesdescriptorsdecoratorsand metaclasseswhich we skipped here because they fall into the core language category that book also explores unicode text in more depth than we did heresince it' an inherent part of python and for help on other python-related topicssee the resources available at python' official websiteengine