bugfix(matrix): correct the loading and saving of empty matrices as TSV files

[laurent-laporte-pro]

Description

The purpose of this pull request is to address an issue encountered when generating empty matrices. In certain cases, empty matrices are saved in TSV format with a newline character instead of being saved as completely empty files.

The proposed solution involves modifying the code to save an empty file when the matrix is empty.

Additionally, when loading an empty file, it will be treated as a 2D empty matrix.

Technical Details

A 2D-NumPy array is considered empty if its size attribute is zero or if its shape is (1, 0). This corresponds to the Python array [[]].

Changes Made

• Modified the code to save an empty file when an empty matrix is encountered during the saving process.
• Updated the loading logic to correctly interpret empty files as 2D empty matrices.
• Improved unit tests to ensure proper reading and writing of empty matrices in TSV format.

Testing

Unit tests have been enhanced to thoroughly validate the functionality of reading and writing empty matrices to disk in TSV format.

Related Issue

close #1731

Checklist

• Code has been tested and is functioning as expected.
• Unit tests have been added or updated to cover the changes.
• Documentation has been updated to reflect these changes, if necessary.

[commit-lint]

Bug Fixes

• matrix: create empty file if the matrix is empty (9155566)

Code Refactoring

• matrix: improve implementation of dataframe saving (c156c3b)
• matrix-service: improve implementation of create_by_importation (b054b8b)

Contributors

laurent-laporte-pro

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