Python library to parse variable length delimited lines.
pip install xlineparseimport datetime as dt
from decimal import Decimal
from typing import Annotated, Literal
import xlineparse as xlp
FooLine = tuple[
Literal["foo"],
int,
Decimal,
Decimal | None,
Annotated[bool, xlp.BoolField(true_value="Y", false_value="F")],
Annotated[dt.date, xlp.DateField(format="%Y-%m-%d")],
Annotated[dt.time, xlp.TimeField(format="%H%M%s")],
]
BarLine = tuple[
Literal["bar"],
int,
]
schema = xlp.Schema.from_type(
delimiter="|",
quote_str=None,
trailing_delimiter=False,
lines=FooLine | BarLine,
)
schema.parse_line("foo|1|3.14||Y|2012-01-02|123200")
# Will return:
(
"foo",
1,
Decimal("3.14"),
None,
True,
dt.date(2012, 1, 2),
dt.time(12, 32, 0),
)Or directly construct Fields:
schema = xlp.Schema(
delimiter="|",
quote_str=None,
trailing_delimiter=False,
lines=[
xlp.Line(
name="a",
fields=[
xlp.DecimalField(
required=True,
round_decimal_places=None,
min_value=Decimal("2.0"),
max_value=None,
)
],
)
],
)
assert schema.parse_line("a|2.0")
# Will return:
("a", Decimal("2.0"))- Maybe the big decimals are just floats?
- Allow delimiters to be escaped.
- Can we make enums quicker by moving to Rust?
uv pip install -e '.[dev]'
maturin develop- Add pypi token and user =
__token__to settings (do this once). - Upversion
pyproject.toml.
git tag -a v0.0.x head -m v0.0.x
git push origin v0.0.x
