paper-xlsxAPI referencestyles.styleableNamedStyleDescriptorpaper-xlsx 0.2.1 API referenceCopy MarkdownOpen Attributes collection attributecollection= '_named_styles' key attributekey= 'xfId'openpyxl.styles.styleablepaper-xlsx 0.2.1 API referenceNumberFormatDescriptorpaper-xlsx 0.2.1 API reference