▁can ▁run ▁development ▁and ▁deployment ▁set ups ▁from ▁the ▁same ▁code base ▁without ▁reve aling ▁sensitive ▁parts ▁of ▁P yl ons , ▁such ▁as ▁the ▁interactive ▁debugger , ▁to ▁production ▁users . ▁ ▁URL ▁dispatch ▁Currently ▁the ▁only ▁widely ▁used ▁URL ▁dispatch er ▁for ▁P yl ons ▁is ▁Rout es , ▁a ▁Python ▁re implementation ▁of ▁Ruby ▁on ▁Rails ' ▁URL ▁dispatch ing , ▁although ▁any ▁W SG I - compatible ▁URL ▁dispatch er ▁can ▁be ▁used . ▁ ▁While ▁Rout es ▁is ▁a ▁separate ▁library , ▁it ▁was ▁developed ▁for ▁use ▁in ▁P yl ons ▁and ▁its ▁development ▁remains ▁closely ▁in ▁sync ▁with ▁P yl ons . ▁ ▁HTML ▁generation ▁Another ▁piece ▁of ▁Rails ▁adapted ▁for ▁P yl ons ▁is ▁Web Hel pers , ▁which ▁provides ▁URL ▁mapping ▁based ▁on ▁the ▁Rout es ▁configuration . ▁Web Hel pers ▁also ▁provides ▁some ▁utility ▁functions ▁for ▁generating ▁JavaScript ▁code ▁making ▁use ▁of ▁the ▁script . ac ulo . us ▁and ▁Pro totype ▁libraries . ▁ ▁Form En code ▁and ▁Form Build ▁are ▁used ▁for ▁HTML ▁form ▁validation ▁and ▁generation ; ▁there ▁has ▁been ▁some ▁use ▁of ▁M ako ▁for ▁form ▁generation ▁using ▁M ako ' s ▁inheritance ▁model . ▁ ▁Tem pl ating ▁My g ht y ▁was ▁the ▁default ▁P yl ons ▁tem pl ating ▁language , ▁but ▁as ▁of ▁version ▁ 0 . 9 . 6 ▁it ▁has ▁been ▁replaced ▁by ▁M ako . ▁Both ▁tem pl ating ▁languages ▁are ▁text - based ▁( as ▁opposed ▁to ▁XML - based ), ▁and