let
Ville = Excel.CurrentWorkbook(){[Name="MaVille"]}[Content]{0}[Column1],
Source = Json.Document(Web.Contents("https://geo.api.gouv.fr/communes?nom=" & Ville)),
#"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"}),
#"Valeurs extraites" = Table.TransformColumns(#"Column1 développé", {"codesPostaux", each Text.Combine(List.Transform(_, Text.From), ","), type text})
in
#"Valeurs extraites"