Zarr version

v3.0.8

Numcodecs version

v0.15.1

Python Version

3.11

Operating System

Mac

Installation

pip in a venv

Description

Negative zero (-0.0) is not distinguished from zero when reading back values from a Zarr array. This differs from the expected behaviour (and Zarr Python v2).

Steps to reproduce

# /// script
# requires-python = ">=3.11"
# dependencies = [
#   "zarr@git+https://github.com/zarr-developers/zarr-python.git@main",
# ]
# ///
#
# This script automatically imports the development branch of zarr to check for issues

import numpy as np
import zarr
print(zarr.array(np.array([0.0, -0.0]))[:])
#zarr.print_debug_info()

This prints

[0. 0.]

But with Zarr 2.18.7 it correctly prints

[ 0. -0.]

Additional output

No response