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:	2026.1.8

Requirements

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

• CPython 3.11.9, 3.12.10, 3.13.11, 3.14.2 64-bit
• NumPy 2.4.0

Revisions

2026.1.8

• Improve code quality and typing.
• Drop support for Python 3.10, support Python 3.14.

2025.1.1

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

2024.5.24

• …

Refer to the CHANGES file for older revisions.

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.])