python example: numpy to pyarrow and parquet

pyt/numpy_to_pyarrow.py

@@ -0,0 +1,24 @@
+
+import pyarrow as pa
+import numpy as np
+import pyarrow.parquet as pq
+
+db = pa.array(np.linspace(10,50,6))
+print(db)
+da = pa.array(np.linspace(0,5,6))
+print(db)
+
+filenam = 'pyarrow_testtab.parquet'
+
+patab = pa.Table.from_arrays([da,db],['entity A [unitA]','entity B [unitB]'])
+print(patab)
+
+# pq.write_table(patab,filenam,compression='BROTLI')
+pq.write_table(patab,filenam,compression='SNAPPY')
+
+df = pq.read_table(filenam)
+print(df)
+print(df.to_pandas())
+
+#import readline
+#readline.write_history_file('generate_pyarrow_table_and_write_parquet.py')