generate data

write_pq.py

import types
import pyarrow.parquet as pq

import pyarrow as pa
import pandas as pd
import numpy as np

data = np.array(np.random.random_sample((5,)), dtype=np.float32)
data2 = np.array(np.random.random_sample((5,)), dtype=np.float32)
data3 = np.array(np.random.random_sample((5,)), dtype=np.float32)
df = pd.DataFrame({
    'x': data,
    'y': data2,
    'z': data3
})

df2 = pd.DataFrame({
    'a': data,
    'b': data2,
    'c': data3
})

table = pa.Table.from_pandas(df)
pq.write_table(table, 'nation.parquet')

table = pa.Table.from_pandas(df2)
pq.write_table(table, 'region.parquet')