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Python package that contains a framework for dealing with custom file formats, modulating reading, data formatting and writing in a scalable and modular way.
cfinterface
is a framework for designing low-level interfaces that depends on complex text or binary file parsing. It provides components for modeling lines, registers, blocks and sections in a declarative way and aggregate these blocks as components for defining files.
Suppose that a complex text file needs to be parsed and the contents of lines with a specific identifier must be extracted and validated. For instance, the line follows the format:
DATA_HIGH ID001 sudo.user 10/20/2025 901.25
If DATA_HIGH
is the identifier that specifies the lines to be read, than one can model it with the Register
class in the cfinterface
framework.
class DataHigh(Register):
IDENTIFIER = "DATA_HIGH"
IDENTIFIER_DIGITS = 9
LINE = Line(
[
LiteralField(size=6, starting_position=11),
LiteralField(size=9, starting_position=19),
DatetimeField(size=10, starting_position=30, format="%M/$d/%Y"),
FloatField(size=6, starting_position=42, decimal_digits=2),
]
)
A Register
depends on the definition of a Line
object, that is composed of Field
objects. By modeling these elements on a declarative way, the user gains access to reading / writing functions on the fly, and the Register
may be added to a RegisterFile
object, so that it can be read / written together with many other registers to files.
Despite the Register
model, files can also be composed of Blocks
and Sections
, and their interfaces can be done to text
or binary
formats. For more information, the docs are available here.
cfinterface
requires python >= 3.10. It this requirement is met, than one may install the framework with
python -m pip install cfinterface
Guides, tutorials and references may be found at the package's official site: https://rjmalves.github.io/cfinterface
FAQs
Interface for handling custom formatted files
We found that cfinterface demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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