WhileThePythonLanguageReference(inThePythonLanguageReference)describestheexactsyntaxandse-manticsofthePythonlanguage,thislibraryreferencemanualdescribesthestandardlibrarythatisdistributedwithPython.ItalsodescribessomeoftheoptionalcomponentsthatarecommonlyincludedinPythondistributions.