Metpy 错误 - AttributeError: `np.unicode_` 在 NumPy 2.0 版本中被删除。使用 `np.str_` 代替

Question

带有 numpy 2.0 的基本 python 抛出一个大错误。我认为 metpy 1.6 解决了 numpy 2.0 的问题。还有人有这个吗？ 谢谢。

操作系统：Ubuntu 24.04

代码：

#!/home/ccc/miniconda3/bin/python
import numpy as np
from metpy.units import units
distance = np.arange(1, 5) * units.meters

执行（错误代码）：

Traceback (most recent call last):
  File "/home/ccc/t1.py", line 3, in <module>
    from metpy.units import units
  File "/home/ccc/miniconda3/lib/python3.12/site-packages/metpy/__init__.py", line 13, in <module>
    from .xarray import *  # noqa: F401, F403, E402
    ^^^^^^^^^^^^^^^^^^^^^
  File "/home/ccc/miniconda3/lib/python3.12/site-packages/metpy/xarray.py", line 27, in <module>
    import xarray as xr
  File "/home/ccc/miniconda3/lib/python3.12/site-packages/xarray/__init__.py", line 1, in <module>
    from xarray import testing, tutorial
  File "/home/ccc/miniconda3/lib/python3.12/site-packages/xarray/testing.py", line 10, in <module>
    from xarray.core import duck_array_ops, formatting, utils
  File "/home/ccc/miniconda3/lib/python3.12/site-packages/xarray/core/duck_array_ops.py", line 36, in <module>
    from xarray.core import dask_array_ops, dtypes, nputils
  File "/home/ccc/miniconda3/lib/python3.12/site-packages/xarray/core/dask_array_ops.py", line 3, in <module>
    from xarray.core import dtypes, nputils
  File "/home/ccc/miniconda3/lib/python3.12/site-packages/xarray/core/dtypes.py", line 43, in <module>
    (np.bytes_, np.unicode_),  # numpy promotes to unicode
                ^^^^^^^^^^^
  File "/home/ccc/miniconda3/lib/python3.12/site-packages/numpy/__init__.py", line 400, in __getattr__
    raise AttributeError(
AttributeError: `np.unicode_` was removed in the NumPy 2.0 release. Use `np.str_` instead.

Answer 1

如果仔细查看回溯，您会发现此错误来自 xarray 代码，而不是 metpy。看起来这个问题与 this issues 相同，并由 this Pull Request 修复。通过确保安装了

xarray >= 2023.09.0

，您应该能够在您的环境中修复此问题。