Read and write QDA files

Qdafile is a Python library to read and write KaleidaGraph(tm) version 3.x QDA data files.

KaleidaGraph is a registered trademark of Abelbeck Software.

Qdafile is no longer being actively developed.

Author:	Christoph Gohlke
License:	BSD 3-Clause
Version:	2025.1.1

Requirements

This revision was tested with the following requirements and dependencies (other versions may work):

• CPython 3.10.11, 3.11.9, 3.12.8, 3.13.1 64-bit
• NumPy 2.1.3

Revisions

2025.1.1

• Improve type hints.
• Drop support for Python 3.9, support Python 3.13.

2024.5.24

• Support NumPy 2.
• Fix docstring examples not correctly rendered on GitHub.
• Add py.typed marker.
• Drop support for Python 3.8 and numpy < 1.22 (NEP29).

2022.9.28

• Return headers as str, not bytes (breaking).
• Add type hints.
• Convert to Google style docstrings.
• Drop support for Python 3.7 and numpy < 1.19 (NEP29).

2021.6.6

• Support os.PathLike file names.
• Drop support for Python 3.6 (NEP 29).

2020.1.1

• Drop support for Python 2.7 and 3.5.

Examples

>>> from qdafile import QDAfile
>>> QDAfile().write('_empty.qda')
>>> QDAfile(
...     [[1.0, 2.0, 0.0], [3.0, 4.0, 5.0], [6.0, 7.0, 0.0]],
...     rows=[2, 3, '2'],
...     headers=['X', 'Y', 'Z'],
...     dtypes=['>f8', '>i4', '>f4'],
... ).write('_test.qda')
>>> qda = QDAfile('_test.qda')
>>> print(qda)
<QDAfile '_test.qda'>
  file id: 12
  columns: 3
  rows: [2, 3, 2]
  headers: ['X', 'Y', 'Z']
  dtypes: ['>f8', '>i4', '>f4']
>>> qda.headers[2]
'Z'
>>> qda[2, : qda.rows[2]]
array([6., 7.])