start = time.time()
mixed = rd.content.pricing.Definition(
['LLY.N','JPM.N','ZVIA.K','JBSS.O','AA', 'BIOb'],
).get_stream()
mixed.open()
snapshot = mixed.get_snapshot()
end = time.time()
print(f"Execution time: {end - start:.4f} seconds")
it has 400 columns, and how can i search for the exact meaning of each column?