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.

Requirements

This release has been tested with the following requirements and dependencies (other versions may work):

• CPython 3.8.10, 3.9.13, 3.10.7, 3.11.0rc2
• NumPy 1.22.4

Revisions

2022.9.28

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

2021.6.6

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

2020.1.1

• Remove support for Python 2.7 and 3.5.

Examples

>>> from qdafile import QDAfile
>>> QDAfile().write('_empty.qda')
>>> QDAfile(
...     [[1.0, 2.0, 0.], [3.0, 4.0, 5.0], [6.0, 7.0, 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.])