I'm trying to pass a list (of one) tuple that has a dict with some values to a function that just passes the input arg back. Empty dicts work, but populated dicts do not (aware of mutability nuances):

def do_something(row):
    return row

tups = [('STOCK', {'opens': [99, 100], 'closes': [100, 101]})]

c = Context(webui=False)
out = c.parallelize(tups).map(do_something).collect()

Error:

File "/usr/local/lib64/python3.9/site-packages/tuplex/context.py", line 163, in parallelize
    ds._dataSet = self._context.parallelize(value_list, columns, schema)
IndexError: map::at

Is there a better way to do this?