Combining lists into one list

Question

datalist = [{'data': [-2,-9,-13,-10,-5,-2,9,-5]},{'data': [-2,-9,-13,-10,-5,-2,9,-5]}]
results = []
results = [line['data'] for line in datalist]
print(results)

The result is [[-2, -9, -13, -10, -5, -2, 9, -5], [-2, -9, -13, -10, -5, -2, 9, -5]] But I want [-2, -9, -13, -10, -5, -2, 9, -5, -2, -9, -13, -10, -5, -2, 9, -5]

how can I do this?

Answer 1

Use one more iteration over inner list as:

results = [data for line in datalist for data in line['data']]