let
Source = Json.Document(Web.Contents("https://geo.api.gouv.fr/communes?nom=Rennes")),
#"Converti en table" = Table.FromList(Source, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
#"Column1 développé" = Table.ExpandRecordColumn(#"Converti en table", "Column1", {"nom", "code", "codeDepartement", "siren", "codeEpci", "codeRegion", "codesPostaux", "population", "_score"}, {"Column1.nom", "Column1.code", "Column1.codeDepartement", "Column1.siren", "Column1.codeEpci", "Column1.codeRegion", "Column1.codesPostaux", "Column1.population", "Column1._score"}),
#"Column1.codesPostaux développé" = Table.ExpandListColumn(#"Column1 développé", "Column1.codesPostaux")
in
#"Column1.codesPostaux développé"