[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-1)In [16]: reader = pa.StreamReader(source)
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-2)
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-3)In [17]: table = reader.read_all()
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-4)
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-5)In [18]: table
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-6)Out[18]: <pyarrow.table.Table at 0x7fae8281f6f0>
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-7)
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-8)In [19]: df = table.to_pandas()
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-9)
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-10)In [20]: df.memory_usage().sum()
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb7-11)Out[20]: 1073741904