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  • NameError: name '_DType_co' is not defined · 7 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
885927432 https://github.com/pydata/xarray/issues/5631#issuecomment-885927432 https://api.github.com/repos/pydata/xarray/issues/5631 IC_kwDOAMm_X840zi4I monocongo 1328158 2021-07-23T21:39:54Z 2021-07-23T21:39:54Z NONE

Thanks to all for your help. Installing typing-extensions did solve the problem, thanks for the heads up @rhkleijn 

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   NameError: name '_DType_co' is not defined 951644054
885867225 https://github.com/pydata/xarray/issues/5631#issuecomment-885867225 https://api.github.com/repos/pydata/xarray/issues/5631 IC_kwDOAMm_X840zULZ rhkleijn 32801740 2021-07-23T19:27:45Z 2021-07-23T19:35:44Z CONTRIBUTOR

From https://github.com/numpy/numpy/issues/19521: installing typing-extensions may help when running on python 3.7.

 
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   NameError: name '_DType_co' is not defined 951644054
885834075 https://github.com/pydata/xarray/issues/5631#issuecomment-885834075 https://api.github.com/repos/pydata/xarray/issues/5631 IC_kwDOAMm_X840zMFb shoyer 1217238 2021-07-23T18:50:37Z 2021-07-23T18:50:37Z MEMBER

OK, closing this over here since it seems to be a bug with numpy rather than xarray

 
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   NameError: name '_DType_co' is not defined 951644054
885828529 https://github.com/pydata/xarray/issues/5631#issuecomment-885828529 https://api.github.com/repos/pydata/xarray/issues/5631 IC_kwDOAMm_X840zKux menzel-gfdl 43218622 2021-07-23T18:39:47Z 2021-07-23T18:45:28Z NONE

I get the same error, as expected:

```python

import numpy.typing Traceback (most recent call last): File "<stdin>", line 1, in <module> File "env/lib/python3.7/site-packages/numpy/typing/init.py", line 316, in <module> from ._dtype_like import ( File "env/lib/python3.7/site-packages/numpy/typing/_dtype_like.py", line 95, in <module> class _SupportsDType(Generic[_DType_co]): NameError: name '_DType_co' is not defined numpy.version.version '1.21.1' ```

numpy is aware of this issue. It looks like it is only an issue for python 3.7.

 
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   NameError: name '_DType_co' is not defined 951644054
885805721 https://github.com/pydata/xarray/issues/5631#issuecomment-885805721 https://api.github.com/repos/pydata/xarray/issues/5631 IC_kwDOAMm_X840zFKZ shoyer 1217238 2021-07-23T17:57:22Z 2021-07-23T17:57:22Z MEMBER

What happens if you just write import numpy.typing ?

 
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   NameError: name '_DType_co' is not defined 951644054
885792974 https://github.com/pydata/xarray/issues/5631#issuecomment-885792974 https://api.github.com/repos/pydata/xarray/issues/5631 IC_kwDOAMm_X840zCDO menzel-gfdl 43218622 2021-07-23T17:34:48Z 2021-07-23T17:36:04Z NONE

I get the same error, but can import numpy with/without xarray installed. I'm running python 3.7.7 on RHEL 7.9 (Maipo):

```python $ pip install --upgrade pip $ pip install xarray $ python3

import numpy import xarray Traceback (most recent call last): File "<stdin>", line 1, in <module> File "env/lib/python3.7/site-packages/xarray/init.py", line 3, in <module> from . import testing, tutorial, ufuncs File "env/lib/python3.7/site-packages/xarray/testing.py", line 8, in <module> from xarray.core import duck_array_ops, formatting, utils File "env/lib/python3.7/site-packages/xarray/core/duck_array_ops.py", line 16, in <module> from . import dask_array_compat, dask_array_ops, dtypes, npcompat, nputils File "env/lib/python3.7/site-packages/xarray/core/npcompat.py", line 81, in <module> from numpy.typing import ArrayLike, DTypeLike File "env/lib/python3.7/site-packages/numpy/typing/init.py", line 316, in <module> from ._dtype_like import ( File "env/lib/python3.7/site-packages/numpy/typing/_dtype_like.py", line 95, in <module> class _SupportsDType(Generic[_DType_co]): NameError: name '_DType_co' is not defined ```

 
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   NameError: name '_DType_co' is not defined 951644054
885783054 https://github.com/pydata/xarray/issues/5631#issuecomment-885783054 https://api.github.com/repos/pydata/xarray/issues/5631 IC_kwDOAMm_X840y_oO max-sixty 5635139 2021-07-23T17:16:03Z 2021-07-23T17:16:03Z MEMBER

@monocongo does it raise an error if you try importing numpy without xarray installed?

 
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   NameError: name '_DType_co' is not defined 951644054

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