paper-xlsxAPI referencepackaging.extendedopenpyxl.packaging.extendedpaper-xlsx 0.2.1 API referenceCopy MarkdownOpen ClassDigSigBlobExtendedPropertiesVectorLpstrVectorVariantStringPropertypaper-xlsx 0.2.1 API referenceDigSigBlobpaper-xlsx 0.2.1 API reference