try:
    # Initialize Tableau Extract API
    ExtractAPI.initialize() # *their* logging
    with Extract(filename) as extract:
        table = None
        if not extract.hasTable('Extract'):
            # Table does not exist; create it
            tableDef = makeTableDefinition()
            table = extract.addTable('Extract', tableDef)
        else:
            # Open an existing table to add more rows
            table = extract.openTable('Extract')
        tableDef = table.getTableDefinition()

    table = extract.openTable('Extract')
tableDef = table.getTableDefinition()
printTableDefinition(tableDef)
insertData(table)

for row in stream:
    insertData(table, row)

for subtable in stream:
    with Extract:
        for row in subtable:
            insertData(table, row)

2016-03-15 15:21:18,454 1540 risk.lib.reports INFO rowcount = 813, new subtable
2016-03-15 15:21:41,161 1540 risk.lib.reports INFO rowcount = 813, new subtable
2016-03-15 15:22:03,167 1540 risk.lib.reports INFO rowcount = 813, new subtable
2016-03-15 15:22:25,632 1540 risk.lib.reports INFO rowcount = 813, new subtable
2016-03-15 15:37:55,924 1540 risk.lib.reports INFO rowcount = 813, new subtable
2016-03-15 15:38:18,788 1540 risk.lib.reports INFO rowcount = 813, new subtable
2016-03-15 15:38:45,430 1540 risk.lib.reports INFO rowcount = 813, new subtable

and Sticky blood, and the walls
and the river of sqral in the room to Soak Red
because the day before that a few day
evil God hohchu'qu' molar