Hands on Python IO

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

StringIO¶

from io import StringIO

sio = StringIO("")
sio

<_io.StringIO at 0x7ff1ec50e940>

sio.write("hello world")

11

sio.getvalue()

'hello world'

You can write anything into a BytesIO. For example, you can pass a BytesIO to pandas.DataFrame.to_parquet to write a pandas DataFrame to the BytesIO in the Parquet format. For more details, please refer to Pandas IO.

from io import BytesIO

bio = BytesIO()
bio

<_io.BytesIO at 0x7ff1ec5340e0>

bio.write(b"hello world")
bio

<_io.BytesIO at 0x7ff1ec5340e0>

bio.getvalue()

b'hello world'