使用pyarrow将struct列写入拼图

import pyarrow as pa
import pyarrow.parquet as pq
import pandas as pd

data = {'col1': [1, 2, 3],
        'col2': [{'a': 1, 'b': 2}, {'a': 3, 'b': 4}, {'a': 5, 'b': 6}]}
df = pd.DataFrame(data)

table = pa.Table.from_pandas(df)

writer = pq.ParquetWriter('output.parquet', table.schema)

writer.write_table(table)
writer.close()