Documentation for the various enumerations used for python-pptx property settings can be found here:
MSO_AUTO_SHAPE_TYPEMSO_AUTO_SIZEMSO_COLOR_TYPEMSO_CONNECTOR_TYPEMSO_FILL_TYPEMSO_LANGUAGE_IDMSO_LINE_DASH_STYLEMSO_PATTERN_TYPEMSO_SHAPE_TYPEMSO_TEXT_UNDERLINE_TYPEMSO_THEME_COLOR_INDEXMSO_VERTICAL_ANCHORPP_ACTION_TYPEPP_MEDIA_TYPEPP_PARAGRAPH_ALIGNMENTPP_PLACEHOLDER_TYPEXL_AXIS_CROSSESXL_CATEGORY_TYPEXL_CHART_TYPEXL_DATA_LABEL_POSITIONXL_LEGEND_POSITIONXL_MARKER_STYLEXL_TICK_LABEL_POSITIONXL_TICK_MARK