Just a guess but perhaps import and use BytesIO instead of StringIO.
On Tue., 26 Jun. 2018, 02:48 Michael A. Smith, <[email protected]> wrote:
> What am I doing wrong here?
>
> Python 3.6.5 (default, Apr 19 2018, 09:00:40)
> [GCC 6.4.0] on linux
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from avro.schema import Parse as parse
> >>> from avro import io
> >>> schema = parse('"float"')
> >>> from io import StringIO
> >>> sio = StringIO()
> >>> binenc = io.BinaryEncoder(sio)
> >>> datwri = io.DatumWriter(schema)
> >>> datwri.write(1.2, binenc)
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File
> "/home/michaels/.virtualenvs/tmp-c44183e906691bd/lib/python3.6/site-packages/avro/io.py",
> line 811, in write
> self.write_data(self.writer_schema, datum, encoder)
> File
> "/home/michaels/.virtualenvs/tmp-c44183e906691bd/lib/python3.6/site-packages/avro/io.py",
> line 826, in write_data
> encoder.write_float(datum)
> File
> "/home/michaels/.virtualenvs/tmp-c44183e906691bd/lib/python3.6/site-packages/avro/io.py",
> line 358, in write_float
> self.WriteByte((bits) & 0xFF)
> File
> "/home/michaels/.virtualenvs/tmp-c44183e906691bd/lib/python3.6/site-packages/avro/io.py",
> line 319, in WriteByte
> self.writer.write(bytes((byte,)))
> TypeError: string argument expected, got 'bytes'
>
> >>> datwri.write('1.2', binenc)
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File
> "/home/michaels/.virtualenvs/tmp-c44183e906691bd/lib/python3.6/site-packages/avro/io.py",
> line 809, in write
> raise AvroTypeException(self.writer_schema, datum)
> avro.io.AvroTypeException: The datum 1.2 is not an example of the schema
> "float"
>
> >>> datwri.write('"1.2"', binenc)
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File
> "/home/michaels/.virtualenvs/tmp-c44183e906691bd/lib/python3.6/site-packages/avro/io.py",
> line 809, in write
> raise AvroTypeException(self.writer_schema, datum)
> avro.io.AvroTypeException: The datum "1.2" is not an example of the schema
> "float"
>
> I can't encode 1.2 using a primitive float schema. What am I doing wrong?
>
