29:null 2a:["$","title",null,{"children":"Nombre d'élus municipaux | Sylvain Lesage | Observable"}] 2f:T6ba,repartition = { // On commence à 0 siège chacun, les listes sont triées par nombre de votes décroissants, et on marque les listes sans élus (- de 5% des voix) const votesExprimes = d3.sum(votes); const limite5pct = votesExprimes * 0.05; const repartition = votes .map((liste, i) => ({ nom: urlNoms?.[i] ?? `Liste ${i + 1}`, votes: liste, reste: 0, sieges: 0, participe: liste >= limite5pct })) .sort((a, b) => d3.descending(a.votes, b.votes)); // La première liste gagne 50% des sièges (arrondi au dessus) const primeMajoritaire = Math.ceil(form.sieges / 2); repartition[0].sieges += primeMajoritaire; // Nombre de listes participant à la répartition du reste des sièges (il faut avoir + de 5%) const nombreListes = repartition.filter((d) => d.participe).length; const reste = form.sieges - primeMajoritaire; let restant = reste; const quotientElectoral = votesExprimes / reste; // Pour chaque liste participant, on répartit les sièges restants for (const liste of repartition) { if (liste.participe) { const sieges = Math.floor(liste.votes / quotientElectoral); liste.reste += sieges; liste.sieges += sieges; restant -= sieges; } } // Plus forte moyenne, s'il reste des sièges à pourvoir while (restant > 0) { const moyennes = repartition.map((liste) => !liste.participe ? 0 : liste.votes / (liste.reste + 1) ); const index = d3.maxIndex(moyennes); repartition[index].reste += 1; repartition[index].sieges += 1; restant -= 1; } return { primeMajoritaire, reste, repartition, votesExprimes, nombreListes, quotientElectoral, restant }; }30:[] 2d:{"id":"fdbdbde54c07b944","slug":"nombre-d-elus-municipaux","title":"Nombre d'élus municipaux","thumbnail":"beda762df614edc4c2bf3dfd574cf269b6b77b65dc3856ba10b71e6edab41c4b","access_level":"public","create_time":"$D2026-03-18T16:02:39.205Z","update_time":"$D2026-03-18T18:14:16.020Z","view_time":null,"first_public_time":"$D2026-03-18T18:16:10.664Z","has_unpublished_edits":null,"fork":false,"stars":0,"starred":false,"owner":{"type":"team","id":"5c7b4ebed88da11a","login":"severo","name":"Sylvain Lesage","avatar_url":"https://avatars-next.observableusercontent.com/7713195c83e5bfd8090ffe70c871c23e743c711e9e712675c99a8960ca8c7944","tier":"starter_2024"},"version":237,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"bf1872cca880d345","login":"severo","name":"Sylvain Lesage","avatar_url":"https://avatars-next.observableusercontent.com/7713195c83e5bfd8090ffe70c871c23e743c711e9e712675c99a8960ca8c7944","tier":null}],"members":[{"type":"team","id":"5c7b4ebed88da11a","login":"severo","name":"Sylvain Lesage","avatar_url":"https://avatars-next.observableusercontent.com/7713195c83e5bfd8090ffe70c871c23e743c711e9e712675c99a8960ca8c7944","tier":"starter_2024","role":"editor"},{"type":"individual","id":"bf1872cca880d345","login":"severo","name":"Sylvain Lesage","avatar_url":"https://avatars-next.observableusercontent.com/7713195c83e5bfd8090ffe70c871c23e743c711e9e712675c99a8960ca8c7944","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"title":"Nombre d'élus municipaux","cells":[{"id":0,"value":"# Nombre d'élus municipaux\n\nJe publie cet outil en vue du second tour des élections municipales en France le 21 mars 2026. Il sert à calculer le **nombre de sièges que chaque liste obtiendra au conseil municipal** en fonction de ses votes.\n\nCommencez par configurer l'outil pour votre commune (voir les [résultats par commune](https://www.resultats-elections.interieur.gouv.fr/municipales2026/index.html)), ou chargez une des villes avec les résultats du premier tour 2026: ${create(exemples2026.rennes, \"Rennes\")}, ${create(exemples2026.nantes, \"Nantes\")}, ${create(exemples2026.toulouse, \"Toulouse\")}.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":10,"value":"viewof form = Inputs.form({\n sieges: Inputs.range([0, 200], {\n label: \"Sièges\",\n step: 1,\n value: urlState?.sieges ?? 55\n }),\n listes: Inputs.range([2, 10], {\n label: \"Listes\",\n step: 1,\n value: urlNoms?.length ?? 3\n })\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":21,"value":"Puis jouez avec le nombre de votes que chaque liste pourrait obtenir dimanche. Le nombre de sièges obtenus se mettra à jour.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":27,"value":"viewof votes = {\n const maxVotes = 600000;\n const listes = form.listes;\n let value = Math.floor(maxVotes / listes);\n\n const inputs = [];\n for (let i = 0; i < listes; i++) {\n const initialValue =\n urlVotes?.[i] ??\n (i === listes - 1 ? maxVotes - (listes - 1) * value : value);\n inputs.push(\n Inputs.range([0, maxVotes], {\n label: urlNoms?.[i] ?? \"Liste \" + (i + 1),\n step: 1,\n value: initialValue\n })\n );\n }\n return Inputs.form(inputs);\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":89,"value":"La répartition des sièges dans le conseil municipal sera:\n\n\n\n \n${repartition.repartition.map((d, i) => {\n return html``\n})}\n \n

Liste	Sièges
${d.nom}	${d.sieges} sièges

","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":111,"value":"bookmark.create(state, \"👉 Mettre à jour l'URL pour partager\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":4,"value":"---\n\nJ'ai utilisé l'article [Municipales 2026 : comment les sièges sont-ils répartis et pourquoi pourrait-il en être autrement ?](https://www.lemonde.fr/les-decodeurs/article/2026/03/12/municipales-2026-comment-les-sieges-sont-ils-repartis-et-pourquoi-pourrait-il-en-etre-autrement_6667508_4355771.html) du Monde comme référence. Pour charger l'exemple utilisé dans l'article, cliquez ici: ${create(exemple2020.data, \"2e tour Brest 2020\")}.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":25,"value":"---\n\n_code_","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":60,"value":"$2f","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":108,"value":"import { create, bookmark } from \"@severo/bookmark\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":115,"value":"urlState = {\n while (true) {\n yield bookmark.read();\n await new Promise((resolve) => {\n window.onhashchange = resolve;\n });\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":226,"value":"urlNoms = Object.keys(urlState?.votes ?? {})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":230,"value":"urlVotes = Object.values(urlState?.votes ?? {})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":213,"value":"state = {\n return {\n sieges: form.sieges,\n votes: Object.fromEntries(\n repartition.repartition.map(({ nom, votes }) => [nom, votes])\n )\n };\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":168,"value":"exemple2020 = ({\n label: \"Brest\",\n data: {\n sieges: 55,\n votes: {\n Cuillandre: 12628,\n Malgorn: 9253,\n Coatanéa: 3530\n }\n }\n})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":131,"value":"// Je n'ai mis que les listes présentes au second tour, en additionant les voix du premier tour en cas de fusion entre plusieurs listes\nexemples2026 = ({\n rennes: {\n sieges: 61,\n votes: { Appéré: 25548, Compagnon: 16628, Mesmeur: 13774 }\n },\n nantes: {\n sieges: 69,\n votes: { Rolland: 42599, \"Chombart de Lauwe\": 40815 }\n },\n toulouse: {\n sieges: 69,\n votes: { Moudenc: 58462, Piquemal: 82519 }\n }\n})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W30","stdlib":"1","titling":"auto"}} 2e:"$2d:body"