dataclass_io

Read and write dataclasses.

dataclass_io provides similar functionality to the standard library's csv.DictReader and csv.DictWriter, and adds type safety.

Installation

dataclass_io may be installed via pip:

pip install dataclass_io

Quickstart

Reading

from dataclasses import dataclass
from dataclass_io import DataclassReader


@dataclass
class MyData:
    foo: int
    bar: str


with open("test.tsv", "w") as testfile:
    testfile.write("foo\tbar\n")
    testfile.write("1\tabc\n")
    testfile.write("2\tdef\n")

with open("test.tsv", "r") as fin:
    reader = DataclassReader(fin, MyData)
    for record in reader:
        print(record.foo)

Writing

from dataclasses import dataclass
from dataclass_io import DataclassWriter


@dataclass
class MyData:
    foo: int
    bar: str


with open("test.tsv", "w") as fout:
    writer = DataclassWriter(fout, MyData)
    for i in range(3):
        record = MyData(foo=i, bar="something")
        writer.write(record)