id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type 1352445128,I_kwDOAMm_X85QnKzI,6957,import xarray fails with numpy 1.20.x,32060225,closed,0,,,2,2022-08-26T15:52:07Z,2022-08-26T16:37:09Z,2022-08-26T16:37:08Z,NONE,,,,"### What happened? After installing xarray version 2022.6.0 (currently the latest one) via `pip install xarray`: ``` $ python -c ""import xarray; print(xarray.__version__)"" Traceback (most recent call last): File """", line 1, in File ""/packages/xarray/xa/lib/python3.9/site-packages/xarray/__init__.py"", line 1, in from . import testing, tutorial File ""/packages/xarray/xa/lib/python3.9/site-packages/xarray/testing.py"", line 9, in from xarray.core import duck_array_ops, formatting, utils File ""/packages/xarray/xa/lib/python3.9/site-packages/xarray/core/duck_array_ops.py"", line 26, in from . import dask_array_compat, dask_array_ops, dtypes, npcompat, nputils File ""/packages/xarray/xa/lib/python3.9/site-packages/xarray/core/npcompat.py"", line 72, in _SupportsDType[np.dtype], File ""/x86_64/anaconda/3/2021.11/lib/python3.9/typing.py"", line 275, in inner return func(*args, **kwds) File ""/x86_64/anaconda/3/2021.11/lib/python3.9/typing.py"", line 999, in __class_getitem__ _check_generic(cls, params, len(cls.__parameters__)) File ""/x86_64/anaconda/3/2021.11/lib/python3.9/typing.py"", line 209, in _check_generic raise TypeError(f""{cls} is not a generic class"") TypeError: is not a generic class ``` My environment includes numpy 1.20.3 which satisfies the minimal requirements in [setup.cfg](https://github.com/pydata/xarray/blob/4ad706fc4ef102c525555d55b20bc7ccc72d7045/setup.cfg#L78). On the other hand, updating it to version 1.21.0 or downgrading it to 1.19.0 solves the problem. ### What did you expect to happen? Successful import of xarray ### Minimal Complete Verifiable Example ```Python python -m venv test source test/bin/activate pip install numpy==1.20.0 pip install xarray==2022.06.0 python -c ""import xarray"" ``` ### MVCE confirmation - [X] Minimal example — the example is as focused as reasonably possible to demonstrate the underlying issue in xarray. - [X] Complete example — the example is self-contained, including all data and the text of any traceback. - [ ] Verifiable example — the example copy & pastes into an IPython prompt or [Binder notebook](https://mybinder.org/v2/gh/pydata/xarray/main?urlpath=lab/tree/doc/examples/blank_template.ipynb), returning the result. - [ ] New issue — a search of GitHub Issues suggests this is not a duplicate. ### Relevant log output _No response_ ### Anything else we need to know? _No response_ ### Environment
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