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      "parameters": [
        "impot_revenu.bareme_ir_depuis_1945.bareme"
      ],
      "source_code": "def formula(foyer_fiscal, period, parameters):\n    nbptr = foyer_fiscal('nbptr', period)\n    rni = foyer_fiscal('rni', period)\n    bareme = parameters(period).impot_revenu.bareme_ir_depuis_1945.bareme\n\n    maries_ou_pacses_ou_jeune_veuf = foyer_fiscal('maries_ou_pacses', period) | foyer_fiscal('jeune_veuf', period)\n    celibataire_ou_divorce_ou_veuf = not_(maries_ou_pacses_ou_jeune_veuf)\n\n    # Si le plafonnement des effets du quotient familial s'applique,\n    # alors le nombre de parts retenu pour le calcul de l'IR (« nbptr_retenu »)\n    # est égal à 1 (contribuables célibataires, divorcés ou veufs) ou 2 (contribuables mariés ou pacsés)\n    # sinon le nombre de parts retenu pour le calcul de l'IR est le nombre de parts de droit commun (« nbptr »)\n    plafonnement_qf = foyer_fiscal('ir_plaf_qf', period) > foyer_fiscal('ir_brut', period)\n    nbptr_retenu = where(\n        plafonnement_qf,\n        (celibataire_ou_divorce_ou_veuf * 1) + (maries_ou_pacses_ou_jeune_veuf * 2),\n        nbptr\n        )\n\n    return bareme.bracket_indices(rni / nbptr_retenu)\n",
      "start_line_number": 1128,
      "stop_line_number": 1148,
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        "ir_brut",
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        "jeune_veuf",
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        "nbptr",
        "rni"
      ]
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  "label": "Tranche du barème appliquée",
  "name": "ir_tranche",
  "reference": {
    "0001-01-01": [
      {
        "href": "https://impots.dispofi.fr/bareme-impot/calcul-impot-par-tranche"
      }
    ]
  },
  "referring_variables": [
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    "contrat_engagement_jeune_montant",
    "ir_taux_marginal"
  ],
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  "stop_line_number": 1148,
  "value_type": "int"
}
