paper-xlsxAPI referenceformatting.ruleopenpyxl.formatting.rulepaper-xlsx 0.2.1 API referenceCopy MarkdownOpen ClassFunctionsColorScaleDataBarFormatObjectIconSetRuleRuleTypeValueDescriptorConditionalFormattingListpaper-xlsx 0.2.1 API referenceColorScalepaper-xlsx 0.2.1 API reference